163732990 has 16 divisors (see below), whose sum is σ = 295946640. Its totient is φ = 65220480.

The previous prime is 163732981. The next prime is 163732999. The reversal of 163732990 is 99237361.

It is an interprime number because it is at equal distance from previous prime (163732981) and next prime (163732999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163732999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31560 + ... + 36379.

It is an arithmetic number, because the mean of its divisors is an integer number (18496665).

Almost surely, 2^163732990 is an apocalyptic number.

163732990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163732990 is a deficient number, since it is larger than the sum of its proper divisors (132213650).

163732990 is a wasteful number, since it uses less digits than its factorization.

163732990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68187.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 163732990 is about 12795.8192391109. The cubic root of 163732990 is about 547.0731464401.

The spelling of 163732990 in words is "one hundred sixty-three million, seven hundred thirty-two thousand, nine hundred ninety".