157683749 has 2 divisors, whose sum is σ = 157683750. Its totient is φ = 157683748.

The previous prime is 157683739. The next prime is 157683767. The reversal of 157683749 is 947386751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87291649 + 70392100 = 9343^2 + 8390^2 .

It is a cyclic number.

It is not a de Polignac number, because 157683749 - 2⁴ = 157683733 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 157683697 and 157683706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157683739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78841874 + 78841875.

It is an arithmetic number, because the mean of its divisors is an integer number (78841875).

Almost surely, 2^157683749 is an apocalyptic number.

It is an amenable number.

157683749 is a deficient number, since it is larger than the sum of its proper divisors (1).

157683749 is an equidigital number, since it uses as much as digits as its factorization.

157683749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 157683749 is about 12557.2189994441. The cubic root of 157683749 is about 540.2510823680.

The spelling of 157683749 in words is "one hundred fifty-seven million, six hundred eighty-three thousand, seven hundred forty-nine".