101574989 has 2 divisors, whose sum is σ = 101574990. Its totient is φ = 101574988.

The previous prime is 101574971. The next prime is 101575013. The reversal of 101574989 is 989475101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59752900 + 41822089 = 7730^2 + 6467^2 .

It is a cyclic number.

It is not a de Polignac number, because 101574989 - 2¹² = 101570893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101574919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50787494 + 50787495.

It is an arithmetic number, because the mean of its divisors is an integer number (50787495).

Almost surely, 2^101574989 is an apocalyptic number.

It is an amenable number.

101574989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101574989 is an equidigital number, since it uses as much as digits as its factorization.

101574989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 101574989 is about 10078.4417942458. The cubic root of 101574989 is about 466.5830180570.

The spelling of 101574989 in words is "one hundred one million, five hundred seventy-four thousand, nine hundred eighty-nine".