1023120987 has 32 divisors (see below), whose sum is σ = 1646476800. Its totient is φ = 552054528.

The previous prime is 1023120977. The next prime is 1023121019. The reversal of 1023120987 is 7890213201.

It is not a de Polignac number, because 1023120987 - 2⁴ = 1023120971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1023120977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122439 + ... + 130527.

It is an arithmetic number, because the mean of its divisors is an integer number (51452400).

Almost surely, 2^1023120987 is an apocalyptic number.

1023120987 is a deficient number, since it is larger than the sum of its proper divisors (623355813).

1023120987 is a wasteful number, since it uses less digits than its factorization.

1023120987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1023120987 is about 31986.2624731306. The cubic root of 1023120987 is about 1007.6483492841.

The spelling of 1023120987 in words is "one billion, twenty-three million, one hundred twenty thousand, nine hundred eighty-seven".