90173968 has 10 divisors (see below), whose sum is σ = 174712094. Its totient is φ = 45086976.

The previous prime is 90173959. The next prime is 90173977. The reversal of 90173968 is 86937109.

It is an interprime number because it is at equal distance from previous prime (90173959) and next prime (90173977).

It can be written as a sum of positive squares in only one way, i.e., 64448784 + 25725184 = 8028^2 + 5072^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2817921 + ... + 2817952.

Almost surely, 2^90173968 is an apocalyptic number.

It is an amenable number.

90173968 is a deficient number, since it is larger than the sum of its proper divisors (84538126).

90173968 is a wasteful number, since it uses less digits than its factorization.

90173968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635881 (or 5635875 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 90173968 is about 9495.9974726197. The cubic root of 90173968 is about 448.4290373334.

The spelling of 90173968 in words is "ninety million, one hundred seventy-three thousand, nine hundred sixty-eight".