64260739 has 2 divisors, whose sum is σ = 64260740. Its totient is φ = 64260738.

The previous prime is 64260593. The next prime is 64260743. The reversal of 64260739 is 93706246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64260739 - 2¹⁵ = 64227971 is a prime.

It is a super-2 number, since 2×64260739² = 8258885153652242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64260698 and 64260707.

It is not a weakly prime, because it can be changed into another prime (64260239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32130369 + 32130370.

It is an arithmetic number, because the mean of its divisors is an integer number (32130370).

Almost surely, 2^64260739 is an apocalyptic number.

64260739 is a deficient number, since it is larger than the sum of its proper divisors (1).

64260739 is an equidigital number, since it uses as much as digits as its factorization.

64260739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 64260739 is about 8016.2796233664. The cubic root of 64260739 is about 400.5424702325.

The spelling of 64260739 in words is "sixty-four million, two hundred sixty thousand, seven hundred thirty-nine".