949109257 has 4 divisors (see below), whose sum is σ = 949764816. Its totient is φ = 948453700.

The previous prime is 949109251. The next prime is 949109321. The reversal of 949109257 is 752901949.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 752901949 = 2999 ⋅251051.

It is a cyclic number.

It is not a de Polignac number, because 949109257 - 2¹⁹ = 948584969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (949109251) 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, 325603 + ... + 328504.

It is an arithmetic number, because the mean of its divisors is an integer number (237441204).

Almost surely, 2^949109257 is an apocalyptic number.

It is an amenable number.

949109257 is a deficient number, since it is larger than the sum of its proper divisors (655559).

949109257 is a wasteful number, since it uses less digits than its factorization.

949109257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655558.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 949109257 is about 30807.6168666127. The cubic root of 949109257 is about 982.7402333473.

The spelling of 949109257 in words is "nine hundred forty-nine million, one hundred nine thousand, two hundred fifty-seven".