687492401 has 2 divisors, whose sum is σ = 687492402. Its totient is φ = 687492400.

The previous prime is 687492397. The next prime is 687492419. The reversal of 687492401 is 104294786.

687492401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686492401 + 1000000 = 26201^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 687492401 - 2² = 687492397 is a prime.

It is not a weakly prime, because it can be changed into another prime (687492101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343746200 + 343746201.

It is an arithmetic number, because the mean of its divisors is an integer number (343746201).

Almost surely, 2^687492401 is an apocalyptic number.

It is an amenable number.

687492401 is a deficient number, since it is larger than the sum of its proper divisors (1).

687492401 is an equidigital number, since it uses as much as digits as its factorization.

687492401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 687492401 is about 26220.0762966091. The cubic root of 687492401 is about 882.5838320478.

The spelling of 687492401 in words is "six hundred eighty-seven million, four hundred ninety-two thousand, four hundred one".