89724157 has 2 divisors, whose sum is σ = 89724158. Its totient is φ = 89724156.

The previous prime is 89724139. The next prime is 89724161. The reversal of 89724157 is 75142798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56385081 + 33339076 = 7509^2 + 5774^2 .

It is a cyclic number.

It is not a de Polignac number, because 89724157 - 2⁷ = 89724029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89704157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44862078 + 44862079.

It is an arithmetic number, because the mean of its divisors is an integer number (44862079).

Almost surely, 2^89724157 is an apocalyptic number.

It is an amenable number.

89724157 is a deficient number, since it is larger than the sum of its proper divisors (1).

89724157 is an equidigital number, since it uses as much as digits as its factorization.

89724157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 89724157 is about 9472.2836211760. The cubic root of 89724157 is about 447.6821675446.

The spelling of 89724157 in words is "eighty-nine million, seven hundred twenty-four thousand, one hundred fifty-seven".