90718729837 has 4 divisors (see below), whose sum is σ = 90721953340. Its totient is φ = 90715506336.

The previous prime is 90718729817. The next prime is 90718729861. The reversal of 90718729837 is 73892781709.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40766032836 + 49952697001 = 201906^2 + 223501^2 .

It is a cyclic number.

It is not a de Polignac number, because 90718729837 - 2⁷ = 90718729709 is a prime.

It is a super-3 number, since 3×90718729837³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90718729817) 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, 1569162 + ... + 1625947.

It is an arithmetic number, because the mean of its divisors is an integer number (22680488335).

Almost surely, 2^90718729837 is an apocalyptic number.

It is an amenable number.

90718729837 is a deficient number, since it is larger than the sum of its proper divisors (3223503).

90718729837 is a wasteful number, since it uses less digits than its factorization.

90718729837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223502.

The product of its (nonzero) digits is 10668672, while the sum is 61.

It can be divided in two parts, 907187 and 29837, that added together give a square (937024 = 968²).

The spelling of 90718729837 in words is "ninety billion, seven hundred eighteen million, seven hundred twenty-nine thousand, eight hundred thirty-seven".