77908354 has 4 divisors (see below), whose sum is σ = 116862534. Its totient is φ = 38954176.

The previous prime is 77908343. The next prime is 77908361. The reversal of 77908354 is 45380977.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45380977 = 4603 ⋅9859.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 38155329 = 6305^2 + 6177^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77908354.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19477087 + ... + 19477090.

Almost surely, 2^77908354 is an apocalyptic number.

77908354 is a deficient number, since it is larger than the sum of its proper divisors (38954180).

77908354 is a wasteful number, since it uses less digits than its factorization.

77908354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38954179.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 77908354 is about 8826.5709083426. The cubic root of 77908354 is about 427.0984640943.

The spelling of 77908354 in words is "seventy-seven million, nine hundred eight thousand, three hundred fifty-four".