139496487 has 24 divisors (see below), whose sum is σ = 202172544. Its totient is φ = 85516704.

The previous prime is 139496471. The next prime is 139496521. The reversal of 139496487 is 784694931.

It is not a de Polignac number, because 139496487 - 2⁴ = 139496471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139496087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254748 + ... + 255294.

It is an arithmetic number, because the mean of its divisors is an integer number (8423856).

Almost surely, 2^139496487 is an apocalyptic number.

139496487 is a deficient number, since it is larger than the sum of its proper divisors (62676057).

139496487 is a wasteful number, since it uses less digits than its factorization.

139496487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1066 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 139496487 is about 11810.8630929327. The cubic root of 139496487 is about 518.6261652054.

The spelling of 139496487 in words is "one hundred thirty-nine million, four hundred ninety-six thousand, four hundred eighty-seven".