69664031 has 2 divisors, whose sum is σ = 69664032. Its totient is φ = 69664030.

The previous prime is 69664019. The next prime is 69664039. The reversal of 69664031 is 13046696.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69664031 - 2¹⁸ = 69401887 is a prime.

It is a super-2 number, since 2×69664031² = 9706154430337922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 69663982 and 69664000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69664039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34832015 + 34832016.

It is an arithmetic number, because the mean of its divisors is an integer number (34832016).

Almost surely, 2^69664031 is an apocalyptic number.

69664031 is a deficient number, since it is larger than the sum of its proper divisors (1).

69664031 is an equidigital number, since it uses as much as digits as its factorization.

69664031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 69664031 is about 8346.4981279576. The cubic root of 69664031 is about 411.4681274948.

The spelling of 69664031 in words is "sixty-nine million, six hundred sixty-four thousand, thirty-one".