77901022 has 4 divisors (see below), whose sum is σ = 116851536. Its totient is φ = 38950510.

The previous prime is 77901017. The next prime is 77901059. The reversal of 77901022 is 22010977.

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: 22010977 = 23 ⋅956999.

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, 19475254 + ... + 19475257.

It is an arithmetic number, because the mean of its divisors is an integer number (29212884).

Almost surely, 2^77901022 is an apocalyptic number.

77901022 is a deficient number, since it is larger than the sum of its proper divisors (38950514).

77901022 is a wasteful number, since it uses less digits than its factorization.

77901022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38950513.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 77901022 is about 8826.1555617381. The cubic root of 77901022 is about 427.0850655132.

Adding to 77901022 its reverse (22010977), we get a palindrome (99911999).

The spelling of 77901022 in words is "seventy-seven million, nine hundred one thousand, twenty-two".