772991042 has 4 divisors (see below), whose sum is σ = 1159486566. Its totient is φ = 386495520.

The previous prime is 772991033. The next prime is 772991047. The reversal of 772991042 is 240199277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 432182521 + 340808521 = 20789^2 + 18461^2 .

It is a super-3 number, since 3×772991042³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (772991047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193247759 + ... + 193247762.

Almost surely, 2^772991042 is an apocalyptic number.

772991042 is a deficient number, since it is larger than the sum of its proper divisors (386495524).

772991042 is a wasteful number, since it uses less digits than its factorization.

772991042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386495523.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 772991042 is about 27802.7164500162. The cubic root of 772991042 is about 917.7509026804.

The spelling of 772991042 in words is "seven hundred seventy-two million, nine hundred ninety-one thousand, forty-two".