157427009 has 2 divisors, whose sum is σ = 157427010. Its totient is φ = 157427008.

The previous prime is 157426981. The next prime is 157427029. The reversal of 157427009 is 900724751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130873600 + 26553409 = 11440^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 157427009 - 2¹⁶ = 157361473 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157427009.

It is not a weakly prime, because it can be changed into another prime (157427029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78713504 + 78713505.

It is an arithmetic number, because the mean of its divisors is an integer number (78713505).

Almost surely, 2^157427009 is an apocalyptic number.

It is an amenable number.

157427009 is a deficient number, since it is larger than the sum of its proper divisors (1).

157427009 is an equidigital number, since it uses as much as digits as its factorization.

157427009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 157427009 is about 12546.9920299648. The cubic root of 157427009 is about 539.9577115947.

The spelling of 157427009 in words is "one hundred fifty-seven million, four hundred twenty-seven thousand, nine".