46139491 has 2 divisors, whose sum is σ = 46139492. Its totient is φ = 46139490.

The previous prime is 46139459. The next prime is 46139497. The reversal of 46139491 is 19493164.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 46139491 - 2⁵ = 46139459 is a prime.

It is equal to p_2782918 and since 46139491 and 2782918 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 46139491.

It is not a weakly prime, because it can be changed into another prime (46139497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23069745 + 23069746.

It is an arithmetic number, because the mean of its divisors is an integer number (23069746).

Almost surely, 2^46139491 is an apocalyptic number.

46139491 is a deficient number, since it is larger than the sum of its proper divisors (1).

46139491 is an equidigital number, since it uses as much as digits as its factorization.

46139491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 46139491 is about 6792.6056119872. The cubic root of 46139491 is about 358.6665976646. Note that the first 3 decimals are identical.

The spelling of 46139491 in words is "forty-six million, one hundred thirty-nine thousand, four hundred ninety-one".