163903957 has 16 divisors (see below), whose sum is σ = 195858432. Its totient is φ = 134109360.

The previous prime is 163903951. The next prime is 163903973. The reversal of 163903957 is 759309361.

It is a happy number.

It is not a de Polignac number, because 163903957 - 2²⁷ = 29686229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163903951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132532 + ... + 133762.

It is an arithmetic number, because the mean of its divisors is an integer number (12241152).

Almost surely, 2^163903957 is an apocalyptic number.

It is an amenable number.

163903957 is a deficient number, since it is larger than the sum of its proper divisors (31954475).

163903957 is a wasteful number, since it uses less digits than its factorization.

163903957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 163903957 is about 12802.4980765474. The cubic root of 163903957 is about 547.2634948012.

The spelling of 163903957 in words is "one hundred sixty-three million, nine hundred three thousand, nine hundred fifty-seven".