157293643 has 4 divisors (see below), whose sum is σ = 169393168. Its totient is φ = 145194120.

The previous prime is 157293641. The next prime is 157293667. The reversal of 157293643 is 346392751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157293643 - 2¹ = 157293641 is a prime.

It is a super-2 number, since 2×157293643² = 49482580256422898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157293596 and 157293605.

It is not an unprimeable number, because it can be changed into a prime (157293641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6049743 + ... + 6049768.

It is an arithmetic number, because the mean of its divisors is an integer number (42348292).

Almost surely, 2^157293643 is an apocalyptic number.

157293643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

157293643 is a deficient number, since it is larger than the sum of its proper divisors (12099525).

157293643 is a wasteful number, since it uses less digits than its factorization.

157293643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12099524.

The product of its digits is 136080, while the sum is 40.

The square root of 157293643 is about 12541.6762436287. The cubic root of 157293643 is about 539.8051915041.

The spelling of 157293643 in words is "one hundred fifty-seven million, two hundred ninety-three thousand, six hundred forty-three".