157965749 has 2 divisors, whose sum is σ = 157965750. Its totient is φ = 157965748.

The previous prime is 157965737. The next prime is 157965823. The reversal of 157965749 is 947569751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155176849 + 2788900 = 12457^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 157965749 - 2¹² = 157961653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157965749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157965719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78982874 + 78982875.

It is an arithmetic number, because the mean of its divisors is an integer number (78982875).

Almost surely, 2^157965749 is an apocalyptic number.

It is an amenable number.

157965749 is a deficient number, since it is larger than the sum of its proper divisors (1).

157965749 is an equidigital number, since it uses as much as digits as its factorization.

157965749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 53.

The square root of 157965749 is about 12568.4425845051. The cubic root of 157965749 is about 540.5729504012.

The spelling of 157965749 in words is "one hundred fifty-seven million, nine hundred sixty-five thousand, seven hundred forty-nine".