90840723 has 4 divisors (see below), whose sum is σ = 121120968. Its totient is φ = 60560480.

The previous prime is 90840719. The next prime is 90840733. The reversal of 90840723 is 32704809.

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 90840723 - 2² = 90840719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90840703) 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, 15140118 + ... + 15140123.

It is an arithmetic number, because the mean of its divisors is an integer number (30280242).

Almost surely, 2^90840723 is an apocalyptic number.

90840723 is a deficient number, since it is larger than the sum of its proper divisors (30280245).

90840723 is a wasteful number, since it uses less digits than its factorization.

90840723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30280244.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 90840723 is about 9531.0399747352. The cubic root of 90840723 is about 449.5315668689.

The spelling of 90840723 in words is "ninety million, eight hundred forty thousand, seven hundred twenty-three".