139262969 has 2 divisors, whose sum is σ = 139262970. Its totient is φ = 139262968.

The previous prime is 139262957. The next prime is 139262983. The reversal of 139262969 is 969262931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87235600 + 52027369 = 9340^2 + 7213^2 .

It is a cyclic number.

It is not a de Polignac number, because 139262969 - 2⁸ = 139262713 is a prime.

It is a super-2 number, since 2×139262969² = 38788349069389922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139252969) 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, 69631484 + 69631485.

It is an arithmetic number, because the mean of its divisors is an integer number (69631485).

Almost surely, 2^139262969 is an apocalyptic number.

It is an amenable number.

139262969 is a deficient number, since it is larger than the sum of its proper divisors (1).

139262969 is an equidigital number, since it uses as much as digits as its factorization.

139262969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 139262969 is about 11800.9732225779. The cubic root of 139262969 is about 518.3366090806.

The spelling of 139262969 in words is "one hundred thirty-nine million, two hundred sixty-two thousand, nine hundred sixty-nine".