42037977929 has 2 divisors, whose sum is σ = 42037977930. Its totient is φ = 42037977928.

The previous prime is 42037977923. The next prime is 42037977977. The reversal of 42037977929 is 92977973024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36700214329 + 5337763600 = 191573^2 + 73060^2 .

It is a cyclic number.

It is not a de Polignac number, because 42037977929 - 2¹² = 42037973833 is a prime.

It is a super-2 number, since 2×42037977929² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42037977923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21018988964 + 21018988965.

It is an arithmetic number, because the mean of its divisors is an integer number (21018988965).

Almost surely, 2^42037977929 is an apocalyptic number.

It is an amenable number.

42037977929 is a deficient number, since it is larger than the sum of its proper divisors (1).

42037977929 is an equidigital number, since it uses as much as digits as its factorization.

42037977929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12002256, while the sum is 59.

The spelling of 42037977929 in words is "forty-two billion, thirty-seven million, nine hundred seventy-seven thousand, nine hundred twenty-nine".