69481631 has 2 divisors, whose sum is σ = 69481632. Its totient is φ = 69481630.

The previous prime is 69481589. The next prime is 69481673. The reversal of 69481631 is 13618496.

It is a balanced prime because it is at equal distance from previous prime (69481589) and next prime (69481673).

It is a cyclic number.

It is not a de Polignac number, because 69481631 - 2¹⁸ = 69219487 is a prime.

It is a super-2 number, since 2×69481631² = 9655394092840322, which contains 22 as substring.

It is equal to p_4089377 and since 69481631 and 4089377 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69481681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34740815 + 34740816.

It is an arithmetic number, because the mean of its divisors is an integer number (34740816).

Almost surely, 2^69481631 is an apocalyptic number.

69481631 is a deficient number, since it is larger than the sum of its proper divisors (1).

69481631 is an equidigital number, since it uses as much as digits as its factorization.

69481631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 69481631 is about 8335.5642280532. The cubic root of 69481631 is about 411.1087005756.

The spelling of 69481631 in words is "sixty-nine million, four hundred eighty-one thousand, six hundred thirty-one".