77490929 has 8 divisors (see below), whose sum is σ = 81677160. Its totient is φ = 73405696.

The previous prime is 77490901. The next prime is 77490977. The reversal of 77490929 is 92909477.

It can be written as a sum of positive squares in 4 ways, for example, as 13490929 + 64000000 = 3673^2 + 8000^2 .

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 77490929 - 2²⁴ = 60713713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77490529) 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, 23672 + ... + 26745.

It is an arithmetic number, because the mean of its divisors is an integer number (10209645).

Almost surely, 2^77490929 is an apocalyptic number.

It is an amenable number.

77490929 is a deficient number, since it is larger than the sum of its proper divisors (4186231).

77490929 is a wasteful number, since it uses less digits than its factorization.

77490929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50499.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 77490929 is about 8802.8932175734. The cubic root of 77490929 is about 426.3343144099.

The spelling of 77490929 in words is "seventy-seven million, four hundred ninety thousand, nine hundred twenty-nine".