77972395 has 8 divisors (see below), whose sum is σ = 94849056. Its totient is φ = 61523136.

The previous prime is 77972393. The next prime is 77972423. The reversal of 77972395 is 59327977.

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

It is a cyclic number.

It is not a de Polignac number, because 77972395 - 2¹ = 77972393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77972393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106447 + ... + 107176.

It is an arithmetic number, because the mean of its divisors is an integer number (11856132).

Almost surely, 2^77972395 is an apocalyptic number.

77972395 is a deficient number, since it is larger than the sum of its proper divisors (16876661).

77972395 is a wasteful number, since it uses less digits than its factorization.

77972395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213701.

The product of its digits is 833490, while the sum is 49.

The square root of 77972395 is about 8830.1979026520. The cubic root of 77972395 is about 427.2154576314.

The spelling of 77972395 in words is "seventy-seven million, nine hundred seventy-two thousand, three hundred ninety-five".