91948537 has 4 divisors (see below), whose sum is σ = 93208180. Its totient is φ = 90688896.

The previous prime is 91948499. The next prime is 91948553. The reversal of 91948537 is 73584919.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55115776 + 36832761 = 7424^2 + 6069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91948537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91948567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629712 + ... + 629857.

It is an arithmetic number, because the mean of its divisors is an integer number (23302045).

Almost surely, 2^91948537 is an apocalyptic number.

It is an amenable number.

91948537 is a deficient number, since it is larger than the sum of its proper divisors (1259643).

91948537 is a wasteful number, since it uses less digits than its factorization.

91948537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259642.

The product of its digits is 272160, while the sum is 46.

The square root of 91948537 is about 9588.9799770361. The cubic root of 91948537 is about 451.3515530731.

The spelling of 91948537 in words is "ninety-one million, nine hundred forty-eight thousand, five hundred thirty-seven".