73879661 has 4 divisors (see below), whose sum is σ = 73897824. Its totient is φ = 73861500.

The previous prime is 73879649. The next prime is 73879679. The reversal of 73879661 is 16697837.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73879661 - 2¹⁸ = 73617517 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 (73879621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (18474456).

Almost surely, 2^73879661 is an apocalyptic number.

It is an amenable number.

73879661 is a deficient number, since it is larger than the sum of its proper divisors (18163).

73879661 is a wasteful number, since it uses less digits than its factorization.

73879661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18162.

The product of its digits is 381024, while the sum is 47.

The square root of 73879661 is about 8595.3278587847. The cubic root of 73879661 is about 419.6059437036.

The spelling of 73879661 in words is "seventy-three million, eight hundred seventy-nine thousand, six hundred sixty-one".