90238719 has 8 divisors (see below), whose sum is σ = 120776832. Its totient is φ = 59929880.

The previous prime is 90238717. The next prime is 90238727. The reversal of 90238719 is 91783209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90238719 - 2¹ = 90238717 is a prime.

It is a super-2 number, since 2×90238719² = 16286052813521922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90238711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56397 + ... + 57974.

It is an arithmetic number, because the mean of its divisors is an integer number (15097104).

Almost surely, 2^90238719 is an apocalyptic number.

90238719 is a deficient number, since it is larger than the sum of its proper divisors (30538113).

90238719 is a wasteful number, since it uses less digits than its factorization.

90238719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114637.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 90238719 is about 9499.4062446029. The cubic root of 90238719 is about 448.5363457655.

It can be divided in two parts, 902 and 38719, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 90238719 in words is "ninety million, two hundred thirty-eight thousand, seven hundred nineteen".