167742157 has 4 divisors (see below), whose sum is σ = 182991456. Its totient is φ = 152492860.

The previous prime is 167742143. The next prime is 167742167. The reversal of 167742157 is 751247761.

It is a happy number.

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: 751247761 = 11 ⋅68295251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167742157 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167742137) 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, 7624633 + ... + 7624654.

It is an arithmetic number, because the mean of its divisors is an integer number (45747864).

Almost surely, 2^167742157 is an apocalyptic number.

It is an amenable number.

167742157 is a deficient number, since it is larger than the sum of its proper divisors (15249299).

167742157 is a wasteful number, since it uses less digits than its factorization.

167742157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15249298.

The product of its digits is 82320, while the sum is 40.

The square root of 167742157 is about 12951.5310677927. The cubic root of 167742157 is about 551.5024013362.

It can be divided in two parts, 1677 and 42157, that added together give a palindrome (43834).

The spelling of 167742157 in words is "one hundred sixty-seven million, seven hundred forty-two thousand, one hundred fifty-seven".