102990786 has 16 divisors (see below), whose sum is σ = 206287968. Its totient is φ = 34279200.

The previous prime is 102990781. The next prime is 102990791. The reversal of 102990786 is 687099201.

It is an interprime number because it is at equal distance from previous prime (102990781) and next prime (102990791).

It is not an unprimeable number, because it can be changed into a prime (102990781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8275 + ... + 16566.

It is an arithmetic number, because the mean of its divisors is an integer number (12892998).

Almost surely, 2^102990786 is an apocalyptic number.

102990786 is an abundant number, since it is smaller than the sum of its proper divisors (103297182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102990786 is a wasteful number, since it uses less digits than its factorization.

102990786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25537.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 102990786 is about 10148.4376137413. The cubic root of 102990786 is about 468.7408366564.

The spelling of 102990786 in words is "one hundred two million, nine hundred ninety thousand, seven hundred eighty-six".