77480293 has 6 divisors (see below), whose sum is σ = 85164422. Its totient is φ = 70436520.

The previous prime is 77480269. The next prime is 77480311. The reversal of 77480293 is 39208477.

It can be written as a sum of positive squares in only one way, i.e., 49252324 + 28227969 = 7018^2 + 5313^2 .

It is not a de Polignac number, because 77480293 - 2¹⁷ = 77349221 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 (77480243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320046 + ... + 320287.

Almost surely, 2^77480293 is an apocalyptic number.

It is an amenable number.

77480293 is a deficient number, since it is larger than the sum of its proper divisors (7684129).

77480293 is a wasteful number, since it uses less digits than its factorization.

77480293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640355 (or 640344 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 77480293 is about 8802.2890772798. The cubic root of 77480293 is about 426.3148080440.

The spelling of 77480293 in words is "seventy-seven million, four hundred eighty thousand, two hundred ninety-three".