1400431057 has 2 divisors, whose sum is σ = 1400431058. Its totient is φ = 1400431056.

The previous prime is 1400431037. The next prime is 1400431063. The reversal of 1400431057 is 7501340041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336926096 + 63504961 = 36564^2 + 7969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400431057 is a prime.

It is a super-2 number, since 2×1400431057² = 3922414290820274498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1400431037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700215528 + 700215529.

It is an arithmetic number, because the mean of its divisors is an integer number (700215529).

Almost surely, 2^1400431057 is an apocalyptic number.

It is an amenable number.

1400431057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400431057 is an equidigital number, since it uses as much as digits as its factorization.

1400431057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1400431057 is about 37422.3336658739. Note that the first 3 decimals coincide. The cubic root of 1400431057 is about 1118.8037442758.

Adding to 1400431057 its reverse (7501340041), we get a palindrome (8901771098).

The spelling of 1400431057 in words is "one billion, four hundred million, four hundred thirty-one thousand, fifty-seven".