90109651 has 2 divisors, whose sum is σ = 90109652. Its totient is φ = 90109650.

The previous prime is 90109637. The next prime is 90109661. The reversal of 90109651 is 15690109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90109651 - 2⁵ = 90109619 is a prime.

It is not a weakly prime, because it can be changed into another prime (90109661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45054825 + 45054826.

It is an arithmetic number, because the mean of its divisors is an integer number (45054826).

Almost surely, 2^90109651 is an apocalyptic number.

90109651 is a deficient number, since it is larger than the sum of its proper divisors (1).

90109651 is an equidigital number, since it uses as much as digits as its factorization.

90109651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 90109651 is about 9492.6103364670. The cubic root of 90109651 is about 448.3223972801.

The spelling of 90109651 in words is "ninety million, one hundred nine thousand, six hundred fifty-one".