77490379 has 4 divisors (see below), whose sum is σ = 81568840. Its totient is φ = 73411920.

The previous prime is 77490319. The next prime is 77490461. The reversal of 77490379 is 97309477.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77490379 - 2¹⁷ = 77359307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77490319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039202 + ... + 2039239.

It is an arithmetic number, because the mean of its divisors is an integer number (20392210).

Almost surely, 2^77490379 is an apocalyptic number.

77490379 is a deficient number, since it is larger than the sum of its proper divisors (4078461).

77490379 is a wasteful number, since it uses less digits than its factorization.

77490379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078460.

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 77490379 is about 8802.8619777888. The cubic root of 77490379 is about 426.3333057566. Note that the first 4 decimals are identical.

The spelling of 77490379 in words is "seventy-seven million, four hundred ninety thousand, three hundred seventy-nine".