157446947 has 8 divisors (see below), whose sum is σ = 183612000. Its totient is φ = 134954232.

The previous prime is 157446899. The next prime is 157446967. The reversal of 157446947 is 749644751.

It is not a de Polignac number, because 157446947 - 2⁸ = 157446691 is a prime.

It is a super-2 number, since 2×157446947² = 49579082239241618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157446967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229172 + ... + 229857.

It is an arithmetic number, because the mean of its divisors is an integer number (22951500).

Almost surely, 2^157446947 is an apocalyptic number.

157446947 is a deficient number, since it is larger than the sum of its proper divisors (26165053).

157446947 is an frugal number, since it uses more digits than its factorization.

157446947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459050 (or 459036 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 157446947 is about 12547.7865378719. The cubic root of 157446947 is about 539.9805056977.

The spelling of 157446947 in words is "one hundred fifty-seven million, four hundred forty-six thousand, nine hundred forty-seven".