202139847 has 128 divisors (see below), whose sum is σ = 397824000. Its totient is φ = 100590336.

The previous prime is 202139813. The next prime is 202139851. The reversal of 202139847 is 748931202.

It is not a de Polignac number, because 202139847 - 2⁷ = 202139719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202139897) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2769003 + ... + 2769075.

It is an arithmetic number, because the mean of its divisors is an integer number (3108000).

Almost surely, 2^202139847 is an apocalyptic number.

202139847 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

202139847 is a deficient number, since it is larger than the sum of its proper divisors (195684153).

202139847 is a wasteful number, since it uses less digits than its factorization.

202139847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 202139847 is about 14217.5893526294. The cubic root of 202139847 is about 586.8818034508.

The spelling of 202139847 in words is "two hundred two million, one hundred thirty-nine thousand, eight hundred forty-seven".