69487731 has 12 divisors (see below), whose sum is σ = 105654120. Its totient is φ = 43886880.

The previous prime is 69487727. The next prime is 69487753. The reversal of 69487731 is 13778496.

It is not a de Polignac number, because 69487731 - 2² = 69487727 is a prime.

It is a super-2 number, since 2×69487731² = 9657089519056722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69487031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203010 + ... + 203351.

It is an arithmetic number, because the mean of its divisors is an integer number (8804510).

Almost surely, 2^69487731 is an apocalyptic number.

69487731 is a deficient number, since it is larger than the sum of its proper divisors (36166389).

69487731 is a wasteful number, since it uses less digits than its factorization.

69487731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406386 (or 406383 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 69487731 is about 8335.9301220680. The cubic root of 69487731 is about 411.1207310440.

The spelling of 69487731 in words is "sixty-nine million, four hundred eighty-seven thousand, seven hundred thirty-one".