401655707 has 2 divisors, whose sum is σ = 401655708. Its totient is φ = 401655706.

The previous prime is 401655701. The next prime is 401655731. The reversal of 401655707 is 707556104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401655707 - 2⁴ = 401655691 is a prime.

It is a super-2 number, since 2×401655707² = 322654613931339698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401655701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200827853 + 200827854.

It is an arithmetic number, because the mean of its divisors is an integer number (200827854).

Almost surely, 2^401655707 is an apocalyptic number.

401655707 is a deficient number, since it is larger than the sum of its proper divisors (1).

401655707 is an equidigital number, since it uses as much as digits as its factorization.

401655707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 401655707 is about 20041.3499295831. The cubic root of 401655707 is about 737.8215130574.

The spelling of 401655707 in words is "four hundred one million, six hundred fifty-five thousand, seven hundred seven".