139307477 has 2 divisors, whose sum is σ = 139307478. Its totient is φ = 139307476.

The previous prime is 139307471. The next prime is 139307533. The reversal of 139307477 is 774703931.

It is a happy number.

139307477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94497841 + 44809636 = 9721^2 + 6694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139307477 is a prime.

It is equal to p_7875158 and since 139307477 and 7875158 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 (139307471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69653738 + 69653739.

It is an arithmetic number, because the mean of its divisors is an integer number (69653739).

Almost surely, 2^139307477 is an apocalyptic number.

It is an amenable number.

139307477 is a deficient number, since it is larger than the sum of its proper divisors (1).

139307477 is an equidigital number, since it uses as much as digits as its factorization.

139307477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 139307477 is about 11802.8588486010. The cubic root of 139307477 is about 518.3918227738.

The spelling of 139307477 in words is "one hundred thirty-nine million, three hundred seven thousand, four hundred seventy-seven".