73879991 has 8 divisors (see below), whose sum is σ = 75866784. Its totient is φ = 71902080.

The previous prime is 73879987. The next prime is 73879997. The reversal of 73879991 is 19997837.

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 73879991 - 2² = 73879987 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 (73879997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16766 + ... + 20708.

It is an arithmetic number, because the mean of its divisors is an integer number (9483348).

Almost surely, 2^73879991 is an apocalyptic number.

73879991 is a deficient number, since it is larger than the sum of its proper divisors (1986793).

73879991 is a wasteful number, since it uses less digits than its factorization.

73879991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441.

The product of its digits is 857304, while the sum is 53.

The square root of 73879991 is about 8595.3470552387. The cubic root of 73879991 is about 419.6065684572.

The spelling of 73879991 in words is "seventy-three million, eight hundred seventy-nine thousand, nine hundred ninety-one".