677440993 has 2 divisors, whose sum is σ = 677440994. Its totient is φ = 677440992.

The previous prime is 677440931. The next prime is 677440997. The reversal of 677440993 is 399044776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440034529 + 237406464 = 20977^2 + 15408^2 .

It is a cyclic number.

It is not a de Polignac number, because 677440993 - 2²⁵ = 643886561 is a prime.

It is not a weakly prime, because it can be changed into another prime (677440997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338720496 + 338720497.

It is an arithmetic number, because the mean of its divisors is an integer number (338720497).

Almost surely, 2^677440993 is an apocalyptic number.

It is an amenable number.

677440993 is a deficient number, since it is larger than the sum of its proper divisors (1).

677440993 is an equidigital number, since it uses as much as digits as its factorization.

677440993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 677440993 is about 26027.6966518361. The cubic root of 677440993 is about 878.2614578075.

The spelling of 677440993 in words is "six hundred seventy-seven million, four hundred forty thousand, nine hundred ninety-three".