157406947 has 4 divisors (see below), whose sum is σ = 159399520. Its totient is φ = 155414376.

The previous prime is 157406941. The next prime is 157406959. The reversal of 157406947 is 749604751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749604751 = 7 ⋅107086393.

It is a cyclic number.

It is not a de Polignac number, because 157406947 - 2³ = 157406939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157406941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996168 + ... + 996325.

It is an arithmetic number, because the mean of its divisors is an integer number (39849880).

Almost surely, 2^157406947 is an apocalyptic number.

157406947 is a deficient number, since it is larger than the sum of its proper divisors (1992573).

157406947 is an equidigital number, since it uses as much as digits as its factorization.

157406947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992572.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 157406947 is about 12546.1925300069. The cubic root of 157406947 is about 539.9347737861.

The spelling of 157406947 in words is "one hundred fifty-seven million, four hundred six thousand, nine hundred forty-seven".