1401409279 has 2 divisors, whose sum is σ = 1401409280. Its totient is φ = 1401409278.

The previous prime is 1401409249. The next prime is 1401409291. The reversal of 1401409279 is 9729041041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401409279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401409249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700704639 + 700704640.

It is an arithmetic number, because the mean of its divisors is an integer number (700704640).

Almost surely, 2^1401409279 is an apocalyptic number.

1401409279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401409279 is an equidigital number, since it uses as much as digits as its factorization.

1401409279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1401409279 is about 37435.4014136352. The cubic root of 1401409279 is about 1119.0641840174.

The spelling of 1401409279 in words is "one billion, four hundred one million, four hundred nine thousand, two hundred seventy-nine".