672035991 has 16 divisors (see below), whose sum is σ = 977961600. Its totient is φ = 407105120.

The previous prime is 672035981. The next prime is 672035999. The reversal of 672035991 is 199530276.

It is a cyclic number.

It is not a de Polignac number, because 672035991 - 2⁶ = 672035927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672035999) 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, 105781 + ... + 111953.

It is an arithmetic number, because the mean of its divisors is an integer number (61122600).

Almost surely, 2^672035991 is an apocalyptic number.

672035991 is a deficient number, since it is larger than the sum of its proper divisors (305925609).

672035991 is a wasteful number, since it uses less digits than its factorization.

672035991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 672035991 is about 25923.6569758204. The cubic root of 672035991 is about 875.9194649279.

The spelling of 672035991 in words is "six hundred seventy-two million, thirty-five thousand, nine hundred ninety-one".