977970819 has 8 divisors (see below), whose sum is σ = 1490241280. Its totient is φ = 558840456.

The previous prime is 977970811. The next prime is 977970821. The reversal of 977970819 is 918079779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 977970819 - 2³ = 977970811 is a prime.

It is a super-2 number, since 2×977970819² = 1912853845631061522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977970811) 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, 23284999 + ... + 23285040.

It is an arithmetic number, because the mean of its divisors is an integer number (186280160).

Almost surely, 2^977970819 is an apocalyptic number.

977970819 is a deficient number, since it is larger than the sum of its proper divisors (512270461).

977970819 is a wasteful number, since it uses less digits than its factorization.

977970819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46570049.

The product of its (nonzero) digits is 2000376, while the sum is 57.

The square root of 977970819 is about 31272.5249860001. The cubic root of 977970819 is about 992.6023493780.

Subtracting from 977970819 its reverse (918079779), we obtain a triangular number (59891040 = T₁₀₉₄₄).

The spelling of 977970819 in words is "nine hundred seventy-seven million, nine hundred seventy thousand, eight hundred nineteen".