77942473 has 4 divisors (see below), whose sum is σ = 89077120. Its totient is φ = 66807828.

The previous prime is 77942437. The next prime is 77942539. The reversal of 77942473 is 37424977.

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 77942473 - 2¹⁷ = 77811401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77942573) 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, 5567313 + ... + 5567326.

It is an arithmetic number, because the mean of its divisors is an integer number (22269280).

Almost surely, 2^77942473 is an apocalyptic number.

It is an amenable number.

77942473 is a deficient number, since it is larger than the sum of its proper divisors (11134647).

77942473 is a wasteful number, since it uses less digits than its factorization.

77942473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134646.

The product of its digits is 296352, while the sum is 43.

The square root of 77942473 is about 8828.5034405611. The cubic root of 77942473 is about 427.1608024916.

The spelling of 77942473 in words is "seventy-seven million, nine hundred forty-two thousand, four hundred seventy-three".