77465972 has 6 divisors (see below), whose sum is σ = 135565458. Its totient is φ = 38732984.

The previous prime is 77465959. The next prime is 77465981. The reversal of 77465972 is 27956477.

It can be written as a sum of positive squares in only one way, i.e., 65383396 + 12082576 = 8086^2 + 3476^2 .

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, 9683243 + ... + 9683250.

It is an arithmetic number, because the mean of its divisors is an integer number (22594243).

Almost surely, 2^77465972 is an apocalyptic number.

It is an amenable number.

77465972 is a deficient number, since it is larger than the sum of its proper divisors (58099486).

77465972 is a wasteful number, since it uses less digits than its factorization.

77465972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19366497 (or 19366495 counting only the distinct ones).

The product of its digits is 740880, while the sum is 47.

The square root of 77465972 is about 8801.4755581096. The cubic root of 77465972 is about 426.2885405880.

The spelling of 77465972 in words is "seventy-seven million, four hundred sixty-five thousand, nine hundred seventy-two".