977842 has 4 divisors (see below), whose sum is σ = 1466766. Its totient is φ = 488920.

The previous prime is 977831. The next prime is 977849. The reversal of 977842 is 248779.

It is a happy number.

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., 904401 + 73441 = 951^2 + 271^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (977849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244459 + ... + 244462.

2⁹⁷⁷⁸⁴² is an apocalyptic number.

977842 is a deficient number, since it is larger than the sum of its proper divisors (488924).

977842 is a wasteful number, since it uses less digits than its factorization.

977842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488923.

The product of its digits is 28224, while the sum is 37.

The square root of 977842 is about 988.8589383729. The cubic root of 977842 is about 99.2558765372.

The spelling of 977842 in words is "nine hundred seventy-seven thousand, eight hundred forty-two".