1659287401 has 2 divisors, whose sum is σ = 1659287402. Its totient is φ = 1659287400.

The previous prime is 1659287353. The next prime is 1659287411. The reversal of 1659287401 is 1047829561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1164447376 + 494840025 = 34124^2 + 22245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1659287401 - 2²⁷ = 1525069673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1659287411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829643700 + 829643701.

It is an arithmetic number, because the mean of its divisors is an integer number (829643701).

Almost surely, 2^1659287401 is an apocalyptic number.

It is an amenable number.

1659287401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659287401 is an equidigital number, since it uses as much as digits as its factorization.

1659287401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1659287401 is about 40734.3516089308. The cubic root of 1659287401 is about 1183.8786952760.

The spelling of 1659287401 in words is "one billion, six hundred fifty-nine million, two hundred eighty-seven thousand, four hundred one".