1400376391 has 2 divisors, whose sum is σ = 1400376392. Its totient is φ = 1400376390.

The previous prime is 1400376379. The next prime is 1400376403. The reversal of 1400376391 is 1936730041.

It is a balanced prime because it is at equal distance from previous prime (1400376379) and next prime (1400376403).

It is a cyclic number.

It is not a de Polignac number, because 1400376391 - 2¹³ = 1400368199 is a prime.

It is a super-2 number, since 2×1400376391² = 3922108072940369762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400376371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700188195 + 700188196.

It is an arithmetic number, because the mean of its divisors is an integer number (700188196).

Almost surely, 2^1400376391 is an apocalyptic number.

1400376391 is the 23668-th centered pentagonal number.

1400376391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400376391 is an equidigital number, since it uses as much as digits as its factorization.

1400376391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 1400376391 is about 37421.6032660280. The cubic root of 1400376391 is about 1118.7891865387.

The spelling of 1400376391 in words is "one billion, four hundred million, three hundred seventy-six thousand, three hundred ninety-one".