157620019 has 2 divisors, whose sum is σ = 157620020. Its totient is φ = 157620018.

The previous prime is 157619981. The next prime is 157620041. The reversal of 157620019 is 910026751.

157620019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157620019 - 2⁹ = 157619507 is a prime.

It is a super-2 number, since 2×157620019² = 49688140779120722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157620059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78810009 + 78810010.

It is an arithmetic number, because the mean of its divisors is an integer number (78810010).

Almost surely, 2^157620019 is an apocalyptic number.

157620019 is a deficient number, since it is larger than the sum of its proper divisors (1).

157620019 is an equidigital number, since it uses as much as digits as its factorization.

157620019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 157620019 is about 12554.6811588347. The cubic root of 157620019 is about 540.1782893224.

The spelling of 157620019 in words is "one hundred fifty-seven million, six hundred twenty thousand, nineteen".