1975904617 has 2 divisors, whose sum is σ = 1975904618. Its totient is φ = 1975904616.

The previous prime is 1975904587. The next prime is 1975904621. The reversal of 1975904617 is 7164095791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1855541776 + 120362841 = 43076^2 + 10971^2 .

It is a cyclic number.

It is not a de Polignac number, because 1975904617 - 2²³ = 1967516009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1975904627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987952308 + 987952309.

It is an arithmetic number, because the mean of its divisors is an integer number (987952309).

Almost surely, 2^1975904617 is an apocalyptic number.

It is an amenable number.

1975904617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975904617 is an equidigital number, since it uses as much as digits as its factorization.

1975904617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 1975904617 is about 44451.1486578244. The cubic root of 1975904617 is about 1254.8408801294.

The spelling of 1975904617 in words is "one billion, nine hundred seventy-five million, nine hundred four thousand, six hundred seventeen".