977248409 has 4 divisors (see below), whose sum is σ = 1010946660. Its totient is φ = 943550160.

The previous prime is 977248381. The next prime is 977248453. The reversal of 977248409 is 904842779.

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

It can be written as a sum of positive squares in 2 ways, for example, as 840826009 + 136422400 = 28997^2 + 11680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977248409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977241409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16849082 + ... + 16849139.

It is an arithmetic number, because the mean of its divisors is an integer number (252736665).

Almost surely, 2^977248409 is an apocalyptic number.

It is an amenable number.

977248409 is a deficient number, since it is larger than the sum of its proper divisors (33698251).

977248409 is a wasteful number, since it uses less digits than its factorization.

977248409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33698250.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 977248409 is about 31260.9726176266. The cubic root of 977248409 is about 992.3578831550.

The spelling of 977248409 in words is "nine hundred seventy-seven million, two hundred forty-eight thousand, four hundred nine".