83621459 has 2 divisors, whose sum is σ = 83621460. Its totient is φ = 83621458.

The previous prime is 83621441. The next prime is 83621479. The reversal of 83621459 is 95412638.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83621459 - 2¹² = 83617363 is a prime.

It is not a weakly prime, because it can be changed into another prime (83621479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41810729 + 41810730.

It is an arithmetic number, because the mean of its divisors is an integer number (41810730).

Almost surely, 2^83621459 is an apocalyptic number.

83621459 is a deficient number, since it is larger than the sum of its proper divisors (1).

83621459 is an equidigital number, since it uses as much as digits as its factorization.

83621459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 83621459 is about 9144.4769670004. The cubic root of 83621459 is about 437.2930552155.

The spelling of 83621459 in words is "eighty-three million, six hundred twenty-one thousand, four hundred fifty-nine".