139848931 has 2 divisors, whose sum is σ = 139848932. Its totient is φ = 139848930.

The previous prime is 139848887. The next prime is 139848977.

It is a happy number.

139848931 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (139848977) can be obtained adding 139848931 to its sum of digits (46).

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 139848931 - 2⁷ = 139848803 is a prime.

It is a super-2 number, since 2×139848931² = 39115447003685522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139848031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69924465 + 69924466.

It is an arithmetic number, because the mean of its divisors is an integer number (69924466).

Almost surely, 2^139848931 is an apocalyptic number.

139848931 is a deficient number, since it is larger than the sum of its proper divisors (1).

139848931 is an equidigital number, since it uses as much as digits as its factorization.

139848931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 139848931 is about 11825.7740127232. The cubic root of 139848931 is about 519.0625751353.

The spelling of 139848931 in words is "one hundred thirty-nine million, eight hundred forty-eight thousand, nine hundred thirty-one".