398561701 has 2 divisors, whose sum is σ = 398561702. Its totient is φ = 398561700.

The previous prime is 398561671. The next prime is 398561729. The reversal of 398561701 is 107165893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256832676 + 141729025 = 16026^2 + 11905^2 .

It is a cyclic number.

It is not a de Polignac number, because 398561701 - 2⁷ = 398561573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398561741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199280850 + 199280851.

It is an arithmetic number, because the mean of its divisors is an integer number (199280851).

Almost surely, 2^398561701 is an apocalyptic number.

It is an amenable number.

398561701 is a deficient number, since it is larger than the sum of its proper divisors (1).

398561701 is an equidigital number, since it uses as much as digits as its factorization.

398561701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 398561701 is about 19964.0101432553. The cubic root of 398561701 is about 735.9221159758.

The spelling of 398561701 in words is "three hundred ninety-eight million, five hundred sixty-one thousand, seven hundred one".