1525090397 has 2 divisors, whose sum is σ = 1525090398. Its totient is φ = 1525090396.

The previous prime is 1525090387. The next prime is 1525090403. The reversal of 1525090397 is 7930905251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1516245721 + 8844676 = 38939^2 + 2974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525090397 - 2²² = 1520896093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525090327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762545198 + 762545199.

It is an arithmetic number, because the mean of its divisors is an integer number (762545199).

Almost surely, 2^1525090397 is an apocalyptic number.

It is an amenable number.

1525090397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525090397 is an equidigital number, since it uses as much as digits as its factorization.

1525090397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 1525090397 is about 39052.4057773654. The cubic root of 1525090397 is about 1151.0615018001.

The spelling of 1525090397 in words is "one billion, five hundred twenty-five million, ninety thousand, three hundred ninety-seven".