90651437 has 2 divisors, whose sum is σ = 90651438. Its totient is φ = 90651436.

The previous prime is 90651401. The next prime is 90651461. The reversal of 90651437 is 73415609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80532676 + 10118761 = 8974^2 + 3181^2 .

It is a cyclic number.

It is not a de Polignac number, because 90651437 - 2¹⁴ = 90635053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90651397 and 90651406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90651467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45325718 + 45325719.

It is an arithmetic number, because the mean of its divisors is an integer number (45325719).

Almost surely, 2^90651437 is an apocalyptic number.

It is an amenable number.

90651437 is a deficient number, since it is larger than the sum of its proper divisors (1).

90651437 is an equidigital number, since it uses as much as digits as its factorization.

90651437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 90651437 is about 9521.1048203452. The cubic root of 90651437 is about 449.2191181530.

The spelling of 90651437 in words is "ninety million, six hundred fifty-one thousand, four hundred thirty-seven".