91870967 has 8 divisors (see below), whose sum is σ = 93175392. Its totient is φ = 90576000.

The previous prime is 91870951. The next prime is 91870973. The reversal of 91870967 is 76907819.

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 91870967 - 2⁴ = 91870951 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 (91870067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18467 + ... + 22907.

It is an arithmetic number, because the mean of its divisors is an integer number (11646924).

Almost surely, 2^91870967 is an apocalyptic number.

91870967 is a deficient number, since it is larger than the sum of its proper divisors (1304425).

91870967 is a wasteful number, since it uses less digits than its factorization.

91870967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 91870967 is about 9584.9343764055. The cubic root of 91870967 is about 451.2245936847.

The spelling of 91870967 in words is "ninety-one million, eight hundred seventy thousand, nine hundred sixty-seven".