157344769 has 4 divisors (see below), whose sum is σ = 158902740. Its totient is φ = 155786800.

The previous prime is 157344727. The next prime is 157344773. The reversal of 157344769 is 967443751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 967443751 = 101 ⋅9578651.

It can be written as a sum of positive squares in 2 ways, for example, as 70761744 + 86583025 = 8412^2 + 9305^2 .

It is a cyclic number.

It is not a de Polignac number, because 157344769 - 2⁷ = 157344641 is a prime.

It is a super-2 number, since 2×157344769² = 49514752663326722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157344709) 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, 778834 + ... + 779035.

It is an arithmetic number, because the mean of its divisors is an integer number (39725685).

Almost surely, 2^157344769 is an apocalyptic number.

It is an amenable number.

157344769 is a deficient number, since it is larger than the sum of its proper divisors (1557971).

157344769 is a wasteful number, since it uses less digits than its factorization.

157344769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557970.

The product of its digits is 635040, while the sum is 46.

The square root of 157344769 is about 12543.7143223210. The cubic root of 157344769 is about 539.8636704317.

It can be divided in two parts, 15734 and 4769, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 157344769 in words is "one hundred fifty-seven million, three hundred forty-four thousand, seven hundred sixty-nine".