139106477 has 2 divisors, whose sum is σ = 139106478. Its totient is φ = 139106476.

The previous prime is 139106453. The next prime is 139106489. The reversal of 139106477 is 774601931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82646281 + 56460196 = 9091^2 + 7514^2 .

It is a cyclic number.

It is not a de Polignac number, because 139106477 - 2⁸ = 139106221 is a prime.

It is a super-2 number, since 2×139106477² = 38701223886703058, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139106477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139106437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69553238 + 69553239.

It is an arithmetic number, because the mean of its divisors is an integer number (69553239).

Almost surely, 2^139106477 is an apocalyptic number.

It is an amenable number.

139106477 is a deficient number, since it is larger than the sum of its proper divisors (1).

139106477 is an equidigital number, since it uses as much as digits as its factorization.

139106477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 139106477 is about 11794.3408887483. The cubic root of 139106477 is about 518.1423819629.

The spelling of 139106477 in words is "one hundred thirty-nine million, one hundred six thousand, four hundred seventy-seven".