69249431 has 2 divisors, whose sum is σ = 69249432. Its totient is φ = 69249430.

The previous prime is 69249379. The next prime is 69249461. The reversal of 69249431 is 13494296.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69249431 is a prime.

It is a super-2 number, since 2×69249431² = 9590967387647522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69249461) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34624715 + 34624716.

It is an arithmetic number, because the mean of its divisors is an integer number (34624716).

Almost surely, 2^69249431 is an apocalyptic number.

69249431 is a deficient number, since it is larger than the sum of its proper divisors (1).

69249431 is an equidigital number, since it uses as much as digits as its factorization.

69249431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 69249431 is about 8321.6243005798. The cubic root of 69249431 is about 410.6502293937.

The spelling of 69249431 in words is "sixty-nine million, two hundred forty-nine thousand, four hundred thirty-one".