90722101 has 2 divisors, whose sum is σ = 90722102. Its totient is φ = 90722100.

The previous prime is 90722083. The next prime is 90722119. The reversal of 90722101 is 10122709.

It is a balanced prime because it is at equal distance from previous prime (90722083) and next prime (90722119).

It can be written as a sum of positive squares in only one way, i.e., 88078225 + 2643876 = 9385^2 + 1626^2 .

It is a cyclic number.

It is not a de Polignac number, because 90722101 - 2⁷ = 90721973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90720101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45361050 + 45361051.

It is an arithmetic number, because the mean of its divisors is an integer number (45361051).

Almost surely, 2^90722101 is an apocalyptic number.

It is an amenable number.

90722101 is a deficient number, since it is larger than the sum of its proper divisors (1).

90722101 is an equidigital number, since it uses as much as digits as its factorization.

90722101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 90722101 is about 9524.8150113270. The cubic root of 90722101 is about 449.3358119279.

The spelling of 90722101 in words is "ninety million, seven hundred twenty-two thousand, one hundred one".