977220742 has 4 divisors (see below), whose sum is σ = 1465831116. Its totient is φ = 488610370.

The previous prime is 977220683. The next prime is 977220767. The reversal of 977220742 is 247022779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247022779 = 149 ⋅1657871.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 977220695 and 977220704.

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, 244305184 + ... + 244305187.

It is an arithmetic number, because the mean of its divisors is an integer number (366457779).

Almost surely, 2^977220742 is an apocalyptic number.

977220742 is a deficient number, since it is larger than the sum of its proper divisors (488610374).

977220742 is a wasteful number, since it uses less digits than its factorization.

977220742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488610373.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 977220742 is about 31260.5300978726. The cubic root of 977220742 is about 992.3485181445.

The spelling of 977220742 in words is "nine hundred seventy-seven million, two hundred twenty thousand, seven hundred forty-two".