102387031 has 4 divisors (see below), whose sum is σ = 102476232. Its totient is φ = 102297832.

The previous prime is 102387011. The next prime is 102387037. The reversal of 102387031 is 130783201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102387031 is a prime.

It is a super-2 number, since 2×102387031² = 20966208233989922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102386987 and 102387005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102387037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42856 + ... + 45181.

It is an arithmetic number, because the mean of its divisors is an integer number (25619058).

Almost surely, 2^102387031 is an apocalyptic number.

102387031 is a deficient number, since it is larger than the sum of its proper divisors (89201).

102387031 is an equidigital number, since it uses as much as digits as its factorization.

102387031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89200.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 102387031 is about 10118.6476863265. The cubic root of 102387031 is about 467.8230864541.

The spelling of 102387031 in words is "one hundred two million, three hundred eighty-seven thousand, thirty-one".