1493167257 has 8 divisors (see below), whose sum is σ = 2212099680. Its totient is φ = 995444820.

The previous prime is 1493167243. The next prime is 1493167267. The reversal of 1493167257 is 7527613941.

It is not a de Polignac number, because 1493167257 - 2⁴ = 1493167241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1493167237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27651219 + ... + 27651272.

It is an arithmetic number, because the mean of its divisors is an integer number (276512460).

Almost surely, 2^1493167257 is an apocalyptic number.

It is an amenable number.

1493167257 is a deficient number, since it is larger than the sum of its proper divisors (718932423).

1493167257 is an equidigital number, since it uses as much as digits as its factorization.

1493167257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55302500 (or 55302494 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 1493167257 is about 38641.5224467153. The cubic root of 1493167257 is about 1142.9734771093.

The spelling of 1493167257 in words is "one billion, four hundred ninety-three million, one hundred sixty-seven thousand, two hundred fifty-seven".