921412537 has 8 divisors (see below), whose sum is σ = 931242312. Its totient is φ = 911635200.

The previous prime is 921412507. The next prime is 921412549. The reversal of 921412537 is 735214129.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 57699216 + 863713321 = 7596^2 + 29389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921412537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921412507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22737 + ... + 48577.

It is an arithmetic number, because the mean of its divisors is an integer number (116405289).

Almost surely, 2^921412537 is an apocalyptic number.

It is an amenable number.

921412537 is a deficient number, since it is larger than the sum of its proper divisors (9829775).

921412537 is a wasteful number, since it uses less digits than its factorization.

921412537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26219.

The product of its digits is 15120, while the sum is 34.

The square root of 921412537 is about 30354.7778282102. Note that the first 3 decimals coincide. The cubic root of 921412537 is about 973.0863317252.

The spelling of 921412537 in words is "nine hundred twenty-one million, four hundred twelve thousand, five hundred thirty-seven".