7649977 has 2 divisors, whose sum is σ = 7649978. Its totient is φ = 7649976.

The previous prime is 7649969. The next prime is 7650011. The reversal of 7649977 is 7799467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6295081 + 1354896 = 2509^2 + 1164^2 .

It is a cyclic number.

It is not a de Polignac number, because 7649977 - 2³ = 7649969 is a prime.

It is a Chen prime.

7649977 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7649977.

It is not a weakly prime, because it can be changed into another prime (7649177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3824988 + 3824989.

It is an arithmetic number, because the mean of its divisors is an integer number (3824989).

Almost surely, 2^7649977 is an apocalyptic number.

It is an amenable number.

7649977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7649977 is an equidigital number, since it uses as much as digits as its factorization.

7649977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 49.

The square root of 7649977 is about 2765.8591793510. The cubic root of 7649977 is about 197.0395361569.

The spelling of 7649977 in words is "seven million, six hundred forty-nine thousand, nine hundred seventy-seven".