139602469 has 2 divisors, whose sum is σ = 139602470. Its totient is φ = 139602468.

The previous prime is 139602461. The next prime is 139602493. The reversal of 139602469 is 964206931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133125444 + 6477025 = 11538^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 139602469 - 2³ = 139602461 is a prime.

It is a super-2 number, since 2×139602469² = 38977698701791922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139602461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69801234 + 69801235.

It is an arithmetic number, because the mean of its divisors is an integer number (69801235).

Almost surely, 2^139602469 is an apocalyptic number.

It is an amenable number.

139602469 is a deficient number, since it is larger than the sum of its proper divisors (1).

139602469 is an equidigital number, since it uses as much as digits as its factorization.

139602469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 139602469 is about 11815.3488733935. The cubic root of 139602469 is about 518.7574734686.

The spelling of 139602469 in words is "one hundred thirty-nine million, six hundred two thousand, four hundred sixty-nine".