1429893257 has 4 divisors (see below), whose sum is σ = 1539885060. Its totient is φ = 1319901456.

The previous prime is 1429893229. The next prime is 1429893271. The reversal of 1429893257 is 7523989241.

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 328914496 + 1100978761 = 18136^2 + 33181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1429893257 - 2¹⁸ = 1429631113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1429893287) 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, 54995882 + ... + 54995907.

It is an arithmetic number, because the mean of its divisors is an integer number (384971265).

Almost surely, 2^1429893257 is an apocalyptic number.

It is an amenable number.

1429893257 is a deficient number, since it is larger than the sum of its proper divisors (109991803).

1429893257 is a wasteful number, since it uses less digits than its factorization.

1429893257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109991802.

The product of its digits is 1088640, while the sum is 50.

The square root of 1429893257 is about 37813.9294043875. The cubic root of 1429893257 is about 1126.5951382041.

The spelling of 1429893257 in words is "one billion, four hundred twenty-nine million, eight hundred ninety-three thousand, two hundred fifty-seven".