69990131 has 2 divisors, whose sum is σ = 69990132. Its totient is φ = 69990130.

The previous prime is 69990077. The next prime is 69990133. The reversal of 69990131 is 13109996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69990131 - 2¹⁰ = 69989107 is a prime.

It is a super-2 number, since 2×69990131² = 9797236874794322, which contains 22 as substring.

Together with 69990133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69990133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34995065 + 34995066.

It is an arithmetic number, because the mean of its divisors is an integer number (34995066).

Almost surely, 2^69990131 is an apocalyptic number.

69990131 is a deficient number, since it is larger than the sum of its proper divisors (1).

69990131 is an equidigital number, since it uses as much as digits as its factorization.

69990131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 69990131 is about 8366.0104589942. The cubic root of 69990131 is about 412.1091609922.

The spelling of 69990131 in words is "sixty-nine million, nine hundred ninety thousand, one hundred thirty-one".