139430131 has 2 divisors, whose sum is σ = 139430132. Its totient is φ = 139430130.

The previous prime is 139430119. The next prime is 139430143. The reversal of 139430131 is 131034931.

139430131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (139430119) and next prime (139430143).

It is a cyclic number.

It is not a de Polignac number, because 139430131 - 2⁷ = 139430003 is a prime.

It is a super-2 number, since 2×139430131² = 38881522861354322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139430096 and 139430105.

It is not a weakly prime, because it can be changed into another prime (139430101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69715065 + 69715066.

It is an arithmetic number, because the mean of its divisors is an integer number (69715066).

Almost surely, 2^139430131 is an apocalyptic number.

139430131 is a deficient number, since it is larger than the sum of its proper divisors (1).

139430131 is an equidigital number, since it uses as much as digits as its factorization.

139430131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 139430131 is about 11808.0536499459. The cubic root of 139430131 is about 518.5439184127.

The spelling of 139430131 in words is "one hundred thirty-nine million, four hundred thirty thousand, one hundred thirty-one".