91945402 has 8 divisors (see below), whose sum is σ = 137958912. Its totient is φ = 45959100.

The previous prime is 91945397. The next prime is 91945409. The reversal of 91945402 is 20454919.

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

It is not an unprimeable number, because it can be changed into a prime (91945409) 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, 8877 + ... + 16207.

It is an arithmetic number, because the mean of its divisors is an integer number (17244864).

Almost surely, 2^91945402 is an apocalyptic number.

91945402 is a deficient number, since it is larger than the sum of its proper divisors (46013510).

91945402 is a wasteful number, since it uses less digits than its factorization.

91945402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13604.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 91945402 is about 9588.8165067437. The cubic root of 91945402 is about 451.3464233805.

It can be divided in two parts, 9194540 and 2, that multiplied together give a triangular number (18389080 = T₆₀₆₄).

The spelling of 91945402 in words is "ninety-one million, nine hundred forty-five thousand, four hundred two".