514139987 has 2 divisors, whose sum is σ = 514139988. Its totient is φ = 514139986.

The previous prime is 514139957. The next prime is 514140007. The reversal of 514139987 is 789931415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-514139987 is a prime.

It is not a weakly prime, because it can be changed into another prime (514139947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257069993 + 257069994.

It is an arithmetic number, because the mean of its divisors is an integer number (257069994).

Almost surely, 2^514139987 is an apocalyptic number.

514139987 is a deficient number, since it is larger than the sum of its proper divisors (1).

514139987 is an equidigital number, since it uses as much as digits as its factorization.

514139987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 514139987 is about 22674.6551682710. The cubic root of 514139987 is about 801.1130273071.

The spelling of 514139987 in words is "five hundred fourteen million, one hundred thirty-nine thousand, nine hundred eighty-seven".