90783751 has 2 divisors, whose sum is σ = 90783752. Its totient is φ = 90783750.

The previous prime is 90783697. The next prime is 90783769. The reversal of 90783751 is 15738709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90783751 - 2⁹ = 90783239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90783151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45391875 + 45391876.

It is an arithmetic number, because the mean of its divisors is an integer number (45391876).

Almost surely, 2^90783751 is an apocalyptic number.

90783751 is a deficient number, since it is larger than the sum of its proper divisors (1).

90783751 is an equidigital number, since it uses as much as digits as its factorization.

90783751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 90783751 is about 9528.0507450370. The cubic root of 90783751 is about 449.4375705954.

The spelling of 90783751 in words is "ninety million, seven hundred eighty-three thousand, seven hundred fifty-one".