1401550439 has 2 divisors, whose sum is σ = 1401550440. Its totient is φ = 1401550438.

The previous prime is 1401550427. The next prime is 1401550453. The reversal of 1401550439 is 9340551041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401550439 - 2²⁴ = 1384773223 is a prime.

It is a super-2 number, since 2×1401550439² = 3928687266122185442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401550039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700775219 + 700775220.

It is an arithmetic number, because the mean of its divisors is an integer number (700775220).

Almost surely, 2^1401550439 is an apocalyptic number.

1401550439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401550439 is an equidigital number, since it uses as much as digits as its factorization.

1401550439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1401550439 is about 37437.2867473058. The cubic root of 1401550439 is about 1119.1017561478.

The spelling of 1401550439 in words is "one billion, four hundred one million, five hundred fifty thousand, four hundred thirty-nine".