139929551 has 2 divisors, whose sum is σ = 139929552. Its totient is φ = 139929550.

The previous prime is 139929521. The next prime is 139929563. The reversal of 139929551 is 155929931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139929551 - 2¹⁴ = 139913167 is a prime.

It is equal to p_7908398 and since 139929551 and 7908398 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139929511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69964775 + 69964776.

It is an arithmetic number, because the mean of its divisors is an integer number (69964776).

Almost surely, 2^139929551 is an apocalyptic number.

139929551 is a deficient number, since it is larger than the sum of its proper divisors (1).

139929551 is an equidigital number, since it uses as much as digits as its factorization.

139929551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 44.

The square root of 139929551 is about 11829.1821779868. The cubic root of 139929551 is about 519.1622989011.

The spelling of 139929551 in words is "one hundred thirty-nine million, nine hundred twenty-nine thousand, five hundred fifty-one".