91631962 has 4 divisors (see below), whose sum is σ = 137447946. Its totient is φ = 45815980.

The previous prime is 91631933. The next prime is 91631971. The reversal of 91631962 is 26913619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26913619 = 191 ⋅140909.

It can be written as a sum of positive squares in only one way, i.e., 55041561 + 36590401 = 7419^2 + 6049^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22907989 + ... + 22907992.

Almost surely, 2^91631962 is an apocalyptic number.

91631962 is a deficient number, since it is larger than the sum of its proper divisors (45815984).

91631962 is a wasteful number, since it uses less digits than its factorization.

91631962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45815983.

The product of its digits is 17496, while the sum is 37.

The square root of 91631962 is about 9572.4585138824. The cubic root of 91631962 is about 450.8329625615.

The spelling of 91631962 in words is "ninety-one million, six hundred thirty-one thousand, nine hundred sixty-two".