157671491 has 2 divisors, whose sum is σ = 157671492. Its totient is φ = 157671490.

The previous prime is 157671461. The next prime is 157671517. The reversal of 157671491 is 194176751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157671491 - 2¹⁰ = 157670467 is a prime.

It is not a weakly prime, because it can be changed into another prime (157671461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78835745 + 78835746.

It is an arithmetic number, because the mean of its divisors is an integer number (78835746).

Almost surely, 2^157671491 is an apocalyptic number.

157671491 is a deficient number, since it is larger than the sum of its proper divisors (1).

157671491 is an equidigital number, since it uses as much as digits as its factorization.

157671491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 157671491 is about 12556.7309041804. The cubic root of 157671491 is about 540.2370826811.

The spelling of 157671491 in words is "one hundred fifty-seven million, six hundred seventy-one thousand, four hundred ninety-one".