1401926399 has 2 divisors, whose sum is σ = 1401926400. Its totient is φ = 1401926398.

The previous prime is 1401926363. The next prime is 1401926417. The reversal of 1401926399 is 9936291041.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9936291041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401926399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401926599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700963199 + 700963200.

It is an arithmetic number, because the mean of its divisors is an integer number (700963200).

Almost surely, 2^1401926399 is an apocalyptic number.

1401926399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401926399 is an equidigital number, since it uses as much as digits as its factorization.

1401926399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1401926399 is about 37442.3076078385. The cubic root of 1401926399 is about 1119.2018119788.

The spelling of 1401926399 in words is "one billion, four hundred one million, nine hundred twenty-six thousand, three hundred ninety-nine".