156742093 has 2 divisors, whose sum is σ = 156742094. Its totient is φ = 156742092.

The previous prime is 156742087. The next prime is 156742121. The reversal of 156742093 is 390247651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79530724 + 77211369 = 8918^2 + 8787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156742093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156742043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78371046 + 78371047.

It is an arithmetic number, because the mean of its divisors is an integer number (78371047).

Almost surely, 2^156742093 is an apocalyptic number.

It is an amenable number.

156742093 is a deficient number, since it is larger than the sum of its proper divisors (1).

156742093 is an equidigital number, since it uses as much as digits as its factorization.

156742093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 156742093 is about 12519.6682464033. The cubic root of 156742093 is about 539.1735104789.

It can be divided in two parts, 1567 and 42093, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 156742093 in words is "one hundred fifty-six million, seven hundred forty-two thousand, ninety-three".