102090619 has 4 divisors (see below), whose sum is σ = 102835944. Its totient is φ = 101345296.

The previous prime is 102090617. The next prime is 102090683. The reversal of 102090619 is 916090201.

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

It is a cyclic number.

It is not a de Polignac number, because 102090619 - 2¹ = 102090617 is a prime.

It is a super-2 number, since 2×102090619² = 20844988975606322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102090617) 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, 372457 + ... + 372730.

It is an arithmetic number, because the mean of its divisors is an integer number (25708986).

Almost surely, 2^102090619 is an apocalyptic number.

102090619 is a deficient number, since it is larger than the sum of its proper divisors (745325).

102090619 is an equidigital number, since it uses as much as digits as its factorization.

102090619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745324.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 102090619 is about 10103.9902513809. The cubic root of 102090619 is about 467.3711984671.

The spelling of 102090619 in words is "one hundred two million, ninety thousand, six hundred nineteen".