91937042 has 4 divisors (see below), whose sum is σ = 137905566. Its totient is φ = 45968520.

The previous prime is 91937039. The next prime is 91937051. The reversal of 91937042 is 24073919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24073919 = 733 ⋅32843.

It can be written as a sum of positive squares in only one way, i.e., 46117681 + 45819361 = 6791^2 + 6769^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91936993 and 91937011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22984259 + ... + 22984262.

Almost surely, 2^91937042 is an apocalyptic number.

91937042 is a deficient number, since it is larger than the sum of its proper divisors (45968524).

91937042 is a wasteful number, since it uses less digits than its factorization.

91937042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45968523.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 91937042 is about 9588.3805723386. The cubic root of 91937042 is about 451.3327436300.

The spelling of 91937042 in words is "ninety-one million, nine hundred thirty-seven thousand, forty-two".