1956428807 has 2 divisors, whose sum is σ = 1956428808. Its totient is φ = 1956428806.

The previous prime is 1956428779. The next prime is 1956428809. The reversal of 1956428807 is 7088246591.

It is a strong prime.

It is an emirp because it is prime and its reverse (7088246591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1956428807 - 2²⁴ = 1939651591 is a prime.

It is a super-2 number, since 2×1956428807² = 7655227353718886498, which contains 22 as substring.

Together with 1956428809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956428809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978214403 + 978214404.

It is an arithmetic number, because the mean of its divisors is an integer number (978214404).

Almost surely, 2^1956428807 is an apocalyptic number.

1956428807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956428807 is an equidigital number, since it uses as much as digits as its factorization.

1956428807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 1956428807 is about 44231.5363400368. The cubic root of 1956428807 is about 1250.7044151249.

The spelling of 1956428807 in words is "one billion, nine hundred fifty-six million, four hundred twenty-eight thousand, eight hundred seven".