157390447 has 2 divisors, whose sum is σ = 157390448. Its totient is φ = 157390446.

The previous prime is 157390439. The next prime is 157390463. The reversal of 157390447 is 744093751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157390447 - 2³ = 157390439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157390417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78695223 + 78695224.

It is an arithmetic number, because the mean of its divisors is an integer number (78695224).

Almost surely, 2^157390447 is an apocalyptic number.

157390447 is a deficient number, since it is larger than the sum of its proper divisors (1).

157390447 is an equidigital number, since it uses as much as digits as its factorization.

157390447 is an odious number, because the sum of its binary digits is odd.

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

The square root of 157390447 is about 12545.5349427595. The cubic root of 157390447 is about 539.9159071154.

The spelling of 157390447 in words is "one hundred fifty-seven million, three hundred ninety thousand, four hundred forty-seven".