749412157 has 4 divisors (see below), whose sum is σ = 807059260. Its totient is φ = 691765056.

The previous prime is 749412149. The next prime is 749412161. The reversal of 749412157 is 751214947.

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

It can be written as a sum of positive squares in 2 ways, for example, as 276523641 + 472888516 = 16629^2 + 21746^2 .

It is a cyclic number.

It is not a de Polignac number, because 749412157 - 2³ = 749412149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749412137) 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, 28823532 + ... + 28823557.

It is an arithmetic number, because the mean of its divisors is an integer number (201764815).

Almost surely, 2^749412157 is an apocalyptic number.

It is an amenable number.

749412157 is a deficient number, since it is larger than the sum of its proper divisors (57647103).

749412157 is a wasteful number, since it uses less digits than its factorization.

749412157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57647102.

The product of its digits is 70560, while the sum is 40.

The square root of 749412157 is about 27375.3932757139. The cubic root of 749412157 is about 908.3228606785.

The spelling of 749412157 in words is "seven hundred forty-nine million, four hundred twelve thousand, one hundred fifty-seven".