157309447 has 8 divisors (see below), whose sum is σ = 159730416. Its totient is φ = 154906752.

The previous prime is 157309441. The next prime is 157309463. The reversal of 157309447 is 744903751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157309447 - 2²³ = 148920839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157309441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13308 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (19966302).

Almost surely, 2^157309447 is an apocalyptic number.

157309447 is a deficient number, since it is larger than the sum of its proper divisors (2420969).

157309447 is a wasteful number, since it uses less digits than its factorization.

157309447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 157309447 is about 12542.3062871228. The cubic root of 157309447 is about 539.8232697841.

The spelling of 157309447 in words is "one hundred fifty-seven million, three hundred nine thousand, four hundred forty-seven".