139498645 has 16 divisors (see below), whose sum is σ = 196664832. Its totient is φ = 93648960.

The previous prime is 139498637. The next prime is 139498661. The reversal of 139498645 is 546894931.

It is a happy number.

It is not a de Polignac number, because 139498645 - 2³ = 139498637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96837 + ... + 98266.

It is an arithmetic number, because the mean of its divisors is an integer number (12291552).

Almost surely, 2^139498645 is an apocalyptic number.

It is an amenable number.

139498645 is a deficient number, since it is larger than the sum of its proper divisors (57166187).

139498645 is a wasteful number, since it uses less digits than its factorization.

139498645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195132.

The product of its digits is 933120, while the sum is 49.

The square root of 139498645 is about 11810.9544491544. The cubic root of 139498645 is about 518.6288395607.

The spelling of 139498645 in words is "one hundred thirty-nine million, four hundred ninety-eight thousand, six hundred forty-five".