77977022 has 4 divisors (see below), whose sum is σ = 116965536. Its totient is φ = 38988510.

The previous prime is 77977013. The next prime is 77977037. The reversal of 77977022 is 22077977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22077977 = 59 ⋅374203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19494254 + ... + 19494257.

It is an arithmetic number, because the mean of its divisors is an integer number (29241384).

Almost surely, 2^77977022 is an apocalyptic number.

77977022 is a deficient number, since it is larger than the sum of its proper divisors (38988514).

77977022 is a wasteful number, since it uses less digits than its factorization.

77977022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38988513.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 77977022 is about 8830.4598974232. The cubic root of 77977022 is about 427.2239080017.

The spelling of 77977022 in words is "seventy-seven million, nine hundred seventy-seven thousand, twenty-two".