977846197 has 2 divisors, whose sum is σ = 977846198. Its totient is φ = 977846196.

The previous prime is 977846161. The next prime is 977846201. The reversal of 977846197 is 791648779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 827195121 + 150651076 = 28761^2 + 12274^2 .

It is an emirp because it is prime and its reverse (791648779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977846197 - 2²⁷ = 843628469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977816197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488923098 + 488923099.

It is an arithmetic number, because the mean of its divisors is an integer number (488923099).

Almost surely, 2^977846197 is an apocalyptic number.

It is an amenable number.

977846197 is a deficient number, since it is larger than the sum of its proper divisors (1).

977846197 is an equidigital number, since it uses as much as digits as its factorization.

977846197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 58.

The square root of 977846197 is about 31270.5324067244. The cubic root of 977846197 is about 992.5601854258.

The spelling of 977846197 in words is "nine hundred seventy-seven million, eight hundred forty-six thousand, one hundred ninety-seven".