77724073 has 8 divisors (see below), whose sum is σ = 89476992. Its totient is φ = 66133536.

The previous prime is 77724067. The next prime is 77724103. The reversal of 77724073 is 37042777.

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

It is not a de Polignac number, because 77724073 - 2⁹ = 77723561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77728073) 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, 39565 + ... + 41482.

It is an arithmetic number, because the mean of its divisors is an integer number (11184624).

Almost surely, 2^77724073 is an apocalyptic number.

It is an amenable number.

77724073 is a deficient number, since it is larger than the sum of its proper divisors (11752919).

77724073 is a wasteful number, since it uses less digits than its factorization.

77724073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81191.

The product of its (nonzero) digits is 57624, while the sum is 37.

The square root of 77724073 is about 8816.1257363992. The cubic root of 77724073 is about 426.7614515845.

The spelling of 77724073 in words is "seventy-seven million, seven hundred twenty-four thousand, seventy-three".