1629431 has 2 divisors, whose sum is σ = 1629432. Its totient is φ = 1629430.

The previous prime is 1629427. The next prime is 1629449. The reversal of 1629431 is 1349261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1629431 - 2² = 1629427 is a prime.

It is a super-2 number, since 2×1629431² = 5310090767522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1629431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1629451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814715 + 814716.

It is an arithmetic number, because the mean of its divisors is an integer number (814716).

2^1629431 is an apocalyptic number.

1629431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629431 is an equidigital number, since it uses as much as digits as its factorization.

1629431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1629431 is about 1276.4916764319. The cubic root of 1629431 is about 117.6734965241.

The spelling of 1629431 in words is "one million, six hundred twenty-nine thousand, four hundred thirty-one".