977140643 has 8 divisors (see below), whose sum is σ = 1003290288. Its totient is φ = 951146784.

The previous prime is 977140631. The next prime is 977140679. The reversal of 977140643 is 346041779.

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 977140643 - 2¹² = 977136547 is a prime.

It is a super-3 number, since 3×977140643³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 977140643.

It is not an unprimeable number, because it can be changed into a prime (977140343) 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, 26180 + ... + 51377.

It is an arithmetic number, because the mean of its divisors is an integer number (125411286).

Almost surely, 2^977140643 is an apocalyptic number.

977140643 is a deficient number, since it is larger than the sum of its proper divisors (26149645).

977140643 is a wasteful number, since it uses less digits than its factorization.

977140643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77893.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 977140643 is about 31259.2489193199. The cubic root of 977140643 is about 992.3214044153.

The spelling of 977140643 in words is "nine hundred seventy-seven million, one hundred forty thousand, six hundred forty-three".