1297913949 has 20 divisors (see below), whose sum is σ = 1939930080. Its totient is φ = 864798120.

The previous prime is 1297913941. The next prime is 1297913963. The reversal of 1297913949 is 9493197921.

It is a happy number.

It is not a de Polignac number, because 1297913949 - 2³ = 1297913941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1297913895 and 1297913904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297913941) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 202504 + ... + 208814.

It is an arithmetic number, because the mean of its divisors is an integer number (96996504).

Almost surely, 2^1297913949 is an apocalyptic number.

It is an amenable number.

1297913949 is a deficient number, since it is larger than the sum of its proper divisors (642016131).

1297913949 is an equidigital number, since it uses as much as digits as its factorization.

1297913949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8862 (or 8853 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 1297913949 is about 36026.5728178521. The cubic root of 1297913949 is about 1090.8088009906.

The spelling of 1297913949 in words is "one billion, two hundred ninety-seven million, nine hundred thirteen thousand, nine hundred forty-nine".