1975072901 has 2 divisors, whose sum is σ = 1975072902. Its totient is φ = 1975072900.

The previous prime is 1975072789. The next prime is 1975072907. The reversal of 1975072901 is 1092705791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1938288676 + 36784225 = 44026^2 + 6065^2 .

It is an emirp because it is prime and its reverse (1092705791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1975072901 - 2³⁰ = 901331077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975072907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987536450 + 987536451.

It is an arithmetic number, because the mean of its divisors is an integer number (987536451).

Almost surely, 2^1975072901 is an apocalyptic number.

It is an amenable number.

1975072901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975072901 is an equidigital number, since it uses as much as digits as its factorization.

1975072901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 1975072901 is about 44441.7922793400. The cubic root of 1975072901 is about 1254.6647890199.

The spelling of 1975072901 in words is "one billion, nine hundred seventy-five million, seventy-two thousand, nine hundred one".