403621839449 has 2 divisors, whose sum is σ = 403621839450. Its totient is φ = 403621839448.

The previous prime is 403621839437. The next prime is 403621839473. The reversal of 403621839449 is 944938126304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257346187849 + 146275651600 = 507293^2 + 382460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403621839449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403621839449.

It is not a weakly prime, because it can be changed into another prime (403621839409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201810919724 + 201810919725.

It is an arithmetic number, because the mean of its divisors is an integer number (201810919725).

Almost surely, 2^403621839449 is an apocalyptic number.

It is an amenable number.

403621839449 is a deficient number, since it is larger than the sum of its proper divisors (1).

403621839449 is an equidigital number, since it uses as much as digits as its factorization.

403621839449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 403621839449 in words is "four hundred three billion, six hundred twenty-one million, eight hundred thirty-nine thousand, four hundred forty-nine".