77197738 has 8 divisors (see below), whose sum is σ = 115833888. Its totient is φ = 38586444.

The previous prime is 77197727. The next prime is 77197759. The reversal of 77197738 is 83779177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77197691 and 77197700.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9195 + ... + 15457.

It is an arithmetic number, because the mean of its divisors is an integer number (14479236).

Almost surely, 2^77197738 is an apocalyptic number.

77197738 is a deficient number, since it is larger than the sum of its proper divisors (38636150).

77197738 is a wasteful number, since it uses less digits than its factorization.

77197738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12428.

The product of its digits is 518616, while the sum is 49.

The square root of 77197738 is about 8786.2243313041. The cubic root of 77197738 is about 425.7959487692.

The spelling of 77197738 in words is "seventy-seven million, one hundred ninety-seven thousand, seven hundred thirty-eight".