139395087 has 60 divisors (see below), whose sum is σ = 239144400. Its totient is φ = 80600832.

The previous prime is 139395079. The next prime is 139395101. The reversal of 139395087 is 780593931.

It is a happy number.

139395087 is a `hidden beast` number, since 139 + 3 + 9 + 508 + 7 = 666.

It is not a de Polignac number, because 139395087 - 2³ = 139395079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139395017) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 232414 + ... + 233012.

It is an arithmetic number, because the mean of its divisors is an integer number (3985740).

Almost surely, 2^139395087 is an apocalyptic number.

139395087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

139395087 is a deficient number, since it is larger than the sum of its proper divisors (99749313).

139395087 is a wasteful number, since it uses less digits than its factorization.

139395087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 139395087 is about 11806.5696542222. The cubic root of 139395087 is about 518.5004716206.

The spelling of 139395087 in words is "one hundred thirty-nine million, three hundred ninety-five thousand, eighty-seven".