630240977 has 2 divisors, whose sum is σ = 630240978. Its totient is φ = 630240976.

The previous prime is 630240973. The next prime is 630240979. The reversal of 630240977 is 779042036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500372161 + 129868816 = 22369^2 + 11396^2 .

It is a cyclic number.

It is not a de Polignac number, because 630240977 - 2² = 630240973 is a prime.

Together with 630240979, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 630240977.

It is not a weakly prime, because it can be changed into another prime (630240973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315120488 + 315120489.

It is an arithmetic number, because the mean of its divisors is an integer number (315120489).

Almost surely, 2^630240977 is an apocalyptic number.

It is an amenable number.

630240977 is a deficient number, since it is larger than the sum of its proper divisors (1).

630240977 is an equidigital number, since it uses as much as digits as its factorization.

630240977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 630240977 is about 25104.6007138134. The cubic root of 630240977 is about 857.3711760961.

The spelling of 630240977 in words is "six hundred thirty million, two hundred forty thousand, nine hundred seventy-seven".