207916990 has 8 divisors (see below), whose sum is σ = 374250600. Its totient is φ = 83166792.

The previous prime is 207916967. The next prime is 207917009. The reversal of 207916990 is 99619702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10395840 + ... + 10395859.

It is an arithmetic number, because the mean of its divisors is an integer number (46781325).

Almost surely, 2^207916990 is an apocalyptic number.

207916990 is a deficient number, since it is larger than the sum of its proper divisors (166333610).

207916990 is a wasteful number, since it uses less digits than its factorization.

207916990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20791706.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 207916990 is about 14419.3269607149. The cubic root of 207916990 is about 592.4203837071.

The spelling of 207916990 in words is "two hundred seven million, nine hundred sixteen thousand, nine hundred ninety".