77438253 has 8 divisors (see below), whose sum is σ = 104495328. Its totient is φ = 51003344.

The previous prime is 77438239. The next prime is 77438293. The reversal of 77438253 is 35283477.

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 77438253 - 2⁶ = 77438189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77438233) 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, 155250 + ... + 155747.

It is an arithmetic number, because the mean of its divisors is an integer number (13061916).

Almost surely, 2^77438253 is an apocalyptic number.

It is an amenable number.

77438253 is a deficient number, since it is larger than the sum of its proper divisors (27057075).

77438253 is a wasteful number, since it uses less digits than its factorization.

77438253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311083.

The product of its digits is 141120, while the sum is 39.

The square root of 77438253 is about 8799.9007380765. The cubic root of 77438253 is about 426.2376894361.

The spelling of 77438253 in words is "seventy-seven million, four hundred thirty-eight thousand, two hundred fifty-three".