7477397491 has 2 divisors, whose sum is σ = 7477397492. Its totient is φ = 7477397490.

The previous prime is 7477397471. The next prime is 7477397527. The reversal of 7477397491 is 1947937747.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7477397491 - 2²⁵ = 7443843059 is a prime.

It is a super-2 number, since 2×7477397491² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7477397401) 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 as a sum of consecutive naturals, namely, 3738698745 + 3738698746.

It is an arithmetic number, because the mean of its divisors is an integer number (3738698746).

Almost surely, 2^7477397491 is an apocalyptic number.

7477397491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7477397491 is an equidigital number, since it uses as much as digits as its factorization.

7477397491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9335088, while the sum is 58.

The square root of 7477397491 is about 86471.9462658266. The cubic root of 7477397491 is about 1955.4654901581.

The spelling of 7477397491 in words is "seven billion, four hundred seventy-seven million, three hundred ninety-seven thousand, four hundred ninety-one".