139252931 has 2 divisors, whose sum is σ = 139252932. Its totient is φ = 139252930.

The previous prime is 139252901. The next prime is 139252969.

139252931 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 139252931 - 2¹⁴ = 139236547 is a prime.

It is a super-2 number, since 2×139252931² = 38782757584181522, which contains 22 as substring.

It is equal to p_7872236 and since 139252931 and 7872236 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 139252891 and 139252900.

It is not a weakly prime, because it can be changed into another prime (139252901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69626465 + 69626466.

It is an arithmetic number, because the mean of its divisors is an integer number (69626466).

Almost surely, 2^139252931 is an apocalyptic number.

139252931 is a deficient number, since it is larger than the sum of its proper divisors (1).

139252931 is an equidigital number, since it uses as much as digits as its factorization.

139252931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 35.

The square root of 139252931 is about 11800.5479110082. The cubic root of 139252931 is about 518.3241549733.

The spelling of 139252931 in words is "one hundred thirty-nine million, two hundred fifty-two thousand, nine hundred thirty-one".