69216731 has 2 divisors, whose sum is σ = 69216732. Its totient is φ = 69216730.

The previous prime is 69216709. The next prime is 69216773. The reversal of 69216731 is 13761296.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69216731 - 2²⁶ = 2107867 is a prime.

It is a super-2 number, since 2×69216731² = 9581911700652722, 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 = 69216691 and 69216700.

It is not a weakly prime, because it can be changed into another prime (69216701) 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 as a sum of consecutive naturals, namely, 34608365 + 34608366.

It is an arithmetic number, because the mean of its divisors is an integer number (34608366).

Almost surely, 2^69216731 is an apocalyptic number.

69216731 is a deficient number, since it is larger than the sum of its proper divisors (1).

69216731 is an equidigital number, since it uses as much as digits as its factorization.

69216731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 69216731 is about 8319.6593079284. The cubic root of 69216731 is about 410.5855820433.

The spelling of 69216731 in words is "sixty-nine million, two hundred sixteen thousand, seven hundred thirty-one".