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64426469 is a prime number
BaseRepresentation
bin1111010111000…
…1000111100101
311111020012111112
43311301013211
5112443121334
610220514405
71411421162
oct365610745
9144205445
1064426469
1133404618
12196aba05
1310469993
1487b1069
1559c94ce
hex3d711e5

64426469 has 2 divisors, whose sum is σ = 64426470. Its totient is φ = 64426468.

The previous prime is 64426451. The next prime is 64426471. The reversal of 64426469 is 96462446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 24900100 = 6287^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 64426469 - 224 = 47649253 is a prime.

It is a super-2 number, since 2×644264692 = 8301539815615922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 64426471, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64426409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32213234 + 32213235.

It is an arithmetic number, because the mean of its divisors is an integer number (32213235).

Almost surely, 264426469 is an apocalyptic number.

It is an amenable number.

64426469 is a deficient number, since it is larger than the sum of its proper divisors (1).

64426469 is an equidigital number, since it uses as much as digits as its factorization.

64426469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 64426469 is about 8026.6100565556. The cubic root of 64426469 is about 400.8865108780.

The spelling of 64426469 in words is "sixty-four million, four hundred twenty-six thousand, four hundred sixty-nine".