157739947 has 2 divisors, whose sum is σ = 157739948. Its totient is φ = 157739946.

The previous prime is 157739891. The next prime is 157739963. The reversal of 157739947 is 749937751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157739947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157739894 and 157739903.

It is not a weakly prime, because it can be changed into another prime (157739987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78869973 + 78869974.

It is an arithmetic number, because the mean of its divisors is an integer number (78869974).

Almost surely, 2^157739947 is an apocalyptic number.

157739947 is a deficient number, since it is larger than the sum of its proper divisors (1).

157739947 is an equidigital number, since it uses as much as digits as its factorization.

157739947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 157739947 is about 12559.4564770933. The cubic root of 157739947 is about 540.3152560160.

The spelling of 157739947 in words is "one hundred fifty-seven million, seven hundred thirty-nine thousand, nine hundred forty-seven".