940951991 has 8 divisors (see below), whose sum is σ = 1131972480. Its totient is φ = 764081208.

The previous prime is 940951987. The next prime is 940951997. The reversal of 940951991 is 199159049.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 940951991 - 2² = 940951987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940951997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3537281 + ... + 3537546.

It is an arithmetic number, because the mean of its divisors is an integer number (141496560).

Almost surely, 2^940951991 is an apocalyptic number.

940951991 is a deficient number, since it is larger than the sum of its proper divisors (191020489).

940951991 is a wasteful number, since it uses less digits than its factorization.

940951991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074853.

The product of its (nonzero) digits is 131220, while the sum is 47.

The square root of 940951991 is about 30674.9407660390. The cubic root of 940951991 is about 979.9166911689.

The spelling of 940951991 in words is "nine hundred forty million, nine hundred fifty-one thousand, nine hundred ninety-one".