1956431401 has 2 divisors, whose sum is σ = 1956431402. Its totient is φ = 1956431400.

The previous prime is 1956431381. The next prime is 1956431413. The reversal of 1956431401 is 1041346591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491813376 + 464618025 = 38624^2 + 21555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956431401 - 2⁵ = 1956431369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1956431441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978215700 + 978215701.

It is an arithmetic number, because the mean of its divisors is an integer number (978215701).

Almost surely, 2^1956431401 is an apocalyptic number.

It is an amenable number.

1956431401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956431401 is an equidigital number, since it uses as much as digits as its factorization.

1956431401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1956431401 is about 44231.5656629968. The cubic root of 1956431401 is about 1250.7049678881.

Adding to 1956431401 its reverse (1041346591), we get a palindrome (2997777992).

The spelling of 1956431401 in words is "one billion, nine hundred fifty-six million, four hundred thirty-one thousand, four hundred one".