1234397957 has 8 divisors (see below), whose sum is σ = 1330565880. Its totient is φ = 1138403520.

The previous prime is 1234397939. The next prime is 1234397981. The reversal of 1234397957 is 7597934321.

It is a Cunningham number, because it is equal to 35134²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 19945156 + 1214452801 = 4466^2 + 34849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1234397957 - 2²⁴ = 1217620741 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 (1234397917) 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, 28394 + ... + 57227.

It is an arithmetic number, because the mean of its divisors is an integer number (166320735).

Almost surely, 2^1234397957 is an apocalyptic number.

It is an amenable number.

1234397957 is a deficient number, since it is larger than the sum of its proper divisors (96167923).

1234397957 is a wasteful number, since it uses less digits than its factorization.

1234397957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86743.

The product of its digits is 1428840, while the sum is 50.

The square root of 1234397957 is about 35134.0000142312. Note that the first 4 decimals coincide. The cubic root of 1234397957 is about 1072.7167568300.

The spelling of 1234397957 in words is "one billion, two hundred thirty-four million, three hundred ninety-seven thousand, nine hundred fifty-seven".