90143901 has 16 divisors (see below), whose sum is σ = 133704000. Its totient is φ = 60025104.

The previous prime is 90143897. The next prime is 90143903. The reversal of 90143901 is 10934109.

It is not a de Polignac number, because 90143901 - 2² = 90143897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90143903) 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, 32050 + ... + 34748.

It is an arithmetic number, because the mean of its divisors is an integer number (8356500).

Almost surely, 2^90143901 is an apocalyptic number.

It is an amenable number.

90143901 is a deficient number, since it is larger than the sum of its proper divisors (43560099).

90143901 is a wasteful number, since it uses less digits than its factorization.

90143901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945 (or 3939 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 90143901 is about 9494.4141999388. The cubic root of 90143901 is about 448.3791914078.

The spelling of 90143901 in words is "ninety million, one hundred forty-three thousand, nine hundred one".