64413131 has 2 divisors, whose sum is σ = 64413132. Its totient is φ = 64413130.

The previous prime is 64413121. The next prime is 64413137. The reversal of 64413131 is 13131446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64413131 - 2²² = 60218827 is a prime.

It is a super-2 number, since 2×64413131² = 8298102890446322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64413097 and 64413106.

It is not a weakly prime, because it can be changed into another prime (64413137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32206565 + 32206566.

It is an arithmetic number, because the mean of its divisors is an integer number (32206566).

Almost surely, 2^64413131 is an apocalyptic number.

64413131 is a deficient number, since it is larger than the sum of its proper divisors (1).

64413131 is an equidigital number, since it uses as much as digits as its factorization.

64413131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 64413131 is about 8025.7791522070. The cubic root of 64413131 is about 400.8588442300.

Adding to 64413131 its reverse (13131446), we get a palindrome (77544577).

The spelling of 64413131 in words is "sixty-four million, four hundred thirteen thousand, one hundred thirty-one".