1924995521 has 2 divisors, whose sum is σ = 1924995522. Its totient is φ = 1924995520.

The previous prime is 1924995503. The next prime is 1924995529. The reversal of 1924995521 is 1255994291.

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., 1311888400 + 613107121 = 36220^2 + 24761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1924995521 is a prime.

It is a super-2 number, since 2×1924995521² = 7411215511740122882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1924995529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962497760 + 962497761.

It is an arithmetic number, because the mean of its divisors is an integer number (962497761).

Almost surely, 2^1924995521 is an apocalyptic number.

It is an amenable number.

1924995521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1924995521 is an equidigital number, since it uses as much as digits as its factorization.

1924995521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 47.

The square root of 1924995521 is about 43874.7708939887. The cubic root of 1924995521 is about 1243.9700025593.

The spelling of 1924995521 in words is "one billion, nine hundred twenty-four million, nine hundred ninety-five thousand, five hundred twenty-one".