977820073 has 8 divisors (see below), whose sum is σ = 1011773696. Its totient is φ = 944017200.

The previous prime is 977820037. The next prime is 977820079. The reversal of 977820073 is 370028779.

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 977820073 - 2¹⁷ = 977689001 is a prime.

It is a super-2 number, since 2×977820073² = 1912264190323450658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977820079) 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, 24411 + ... + 50512.

It is an arithmetic number, because the mean of its divisors is an integer number (126471712).

Almost surely, 2^977820073 is an apocalyptic number.

It is an amenable number.

977820073 is a deficient number, since it is larger than the sum of its proper divisors (33953623).

977820073 is a wasteful number, since it uses less digits than its factorization.

977820073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75375.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 977820073 is about 31270.1146943851. The cubic root of 977820073 is about 992.5513463148.

The spelling of 977820073 in words is "nine hundred seventy-seven million, eight hundred twenty thousand, seventy-three".