91242406 has 4 divisors (see below), whose sum is σ = 136863612. Its totient is φ = 45621202.

The previous prime is 91242391. The next prime is 91242421. The reversal of 91242406 is 60424219.

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

It is an interprime number because it is at equal distance from previous prime (91242391) and next prime (91242421).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22810600 + ... + 22810603.

It is an arithmetic number, because the mean of its divisors is an integer number (34215903).

Almost surely, 2^91242406 is an apocalyptic number.

91242406 is a deficient number, since it is larger than the sum of its proper divisors (45621206).

91242406 is a wasteful number, since it uses less digits than its factorization.

91242406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45621205.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 91242406 is about 9552.0890908743. The cubic root of 91242406 is about 450.1931779652.

The spelling of 91242406 in words is "ninety-one million, two hundred forty-two thousand, four hundred six".