2519999939 has 2 divisors, whose sum is σ = 2519999940. Its totient is φ = 2519999938.

The previous prime is 2519999873. The next prime is 2520000017. The reversal of 2519999939 is 9399999152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2519999939 - 2²⁴ = 2503222723 is a prime.

It is not a weakly prime, because it can be changed into another prime (2519999239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259999969 + 1259999970.

It is an arithmetic number, because the mean of its divisors is an integer number (1259999970).

Almost surely, 2^2519999939 is an apocalyptic number.

2519999939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2519999939 is an equidigital number, since it uses as much as digits as its factorization.

2519999939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15943230, while the sum is 65.

The square root of 2519999939 is about 50199.6009844700. The cubic root of 2519999939 is about 1360.8184122105.

The spelling of 2519999939 in words is "two billion, five hundred nineteen million, nine hundred ninety-nine thousand, nine hundred thirty-nine".