2734639987 has 2 divisors, whose sum is σ = 2734639988. Its totient is φ = 2734639986.

The previous prime is 2734639949. The next prime is 2734640023. The reversal of 2734639987 is 7899364372.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2734639987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2734639387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1367319993 + 1367319994.

It is an arithmetic number, because the mean of its divisors is an integer number (1367319994).

Almost surely, 2^2734639987 is an apocalyptic number.

2734639987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2734639987 is an equidigital number, since it uses as much as digits as its factorization.

2734639987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 58.

The square root of 2734639987 is about 52293.7853573443. The cubic root of 2734639987 is about 1398.4063476515.

The spelling of 2734639987 in words is "two billion, seven hundred thirty-four million, six hundred thirty-nine thousand, nine hundred eighty-seven".