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624387961 is a prime number
BaseRepresentation
bin100101001101110…
…110011101111001
31121111220012021001
4211031312131321
52234320403321
6141542445001
721321132031
oct4515663571
91544805231
10624387961
112a04a5a0a
12155133761
139c487342
145ccd48c1
1539c38c91
hex25376779

624387961 has 2 divisors, whose sum is σ = 624387962. Its totient is φ = 624387960.

The previous prime is 624387889. The next prime is 624387971. The reversal of 624387961 is 169783426.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569108736 + 55279225 = 23856^2 + 7435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-624387961 is a prime.

It is not a weakly prime, because it can be changed into another prime (624387971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312193980 + 312193981.

It is an arithmetic number, because the mean of its divisors is an integer number (312193981).

Almost surely, 2624387961 is an apocalyptic number.

It is an amenable number.

624387961 is a deficient number, since it is larger than the sum of its proper divisors (1).

624387961 is an equidigital number, since it uses as much as digits as its factorization.

624387961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 624387961 is about 24987.7562217979. The cubic root of 624387961 is about 854.7087963311.

The spelling of 624387961 in words is "six hundred twenty-four million, three hundred eighty-seven thousand, nine hundred sixty-one".