157673881 has 4 divisors (see below), whose sum is σ = 157790592. Its totient is φ = 157557172.

The previous prime is 157673863. The next prime is 157673891. The reversal of 157673881 is 188376751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188376751 = 389 ⋅484259.

It is a cyclic number.

It is not a de Polignac number, because 157673881 - 2⁷ = 157673753 is a prime.

It is a super-2 number, since 2×157673881² = 49722105499204322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157673851) 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, 56305 + ... + 59038.

It is an arithmetic number, because the mean of its divisors is an integer number (39447648).

Almost surely, 2^157673881 is an apocalyptic number.

It is an amenable number.

157673881 is a deficient number, since it is larger than the sum of its proper divisors (116711).

157673881 is a wasteful number, since it uses less digits than its factorization.

157673881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116710.

The product of its digits is 282240, while the sum is 46.

The square root of 157673881 is about 12556.8260719021. The cubic root of 157673881 is about 540.2398123229.

It can be divided in two parts, 1576 and 73881, that added together give a palindrome (75457).

The spelling of 157673881 in words is "one hundred fifty-seven million, six hundred seventy-three thousand, eight hundred eighty-one".