2039515991 has 2 divisors, whose sum is σ = 2039515992. Its totient is φ = 2039515990.

The previous prime is 2039515939. The next prime is 2039515997. The reversal of 2039515991 is 1995159302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2039515991 - 2¹⁸ = 2039253847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2039515997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1019757995 + 1019757996.

It is an arithmetic number, because the mean of its divisors is an integer number (1019757996).

Almost surely, 2^2039515991 is an apocalyptic number.

2039515991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2039515991 is an equidigital number, since it uses as much as digits as its factorization.

2039515991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 2039515991 is about 45161.0007750050. Note that the first 3 decimals coincide. The cubic root of 2039515991 is about 1268.1648305710.

The spelling of 2039515991 in words is "two billion, thirty-nine million, five hundred fifteen thousand, nine hundred ninety-one".