157403509 has 2 divisors, whose sum is σ = 157403510. Its totient is φ = 157403508.

The previous prime is 157403507. The next prime is 157403539. The reversal of 157403509 is 905304751.

157403509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155700484 + 1703025 = 12478^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 157403509 - 2¹ = 157403507 is a prime.

Together with 157403507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157403507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78701754 + 78701755.

It is an arithmetic number, because the mean of its divisors is an integer number (78701755).

Almost surely, 2^157403509 is an apocalyptic number.

It is an amenable number.

157403509 is a deficient number, since it is larger than the sum of its proper divisors (1).

157403509 is an equidigital number, since it uses as much as digits as its factorization.

157403509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 157403509 is about 12546.0555155794. The cubic root of 157403509 is about 539.9308427667.

The spelling of 157403509 in words is "one hundred fifty-seven million, four hundred three thousand, five hundred nine".