1511113987 has 2 divisors, whose sum is σ = 1511113988. Its totient is φ = 1511113986.

The previous prime is 1511113963. The next prime is 1511114009. The reversal of 1511113987 is 7893111151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1511113987 - 2⁷ = 1511113859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1511113907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 755556993 + 755556994.

It is an arithmetic number, because the mean of its divisors is an integer number (755556994).

Almost surely, 2^1511113987 is an apocalyptic number.

1511113987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1511113987 is an equidigital number, since it uses as much as digits as its factorization.

1511113987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 37.

The square root of 1511113987 is about 38873.0496231001. The cubic root of 1511113987 is about 1147.5344751312.

The spelling of 1511113987 in words is "one billion, five hundred eleven million, one hundred thirteen thousand, nine hundred eighty-seven".