83954621 has 2 divisors, whose sum is σ = 83954622. Its totient is φ = 83954620.

The previous prime is 83954569. The next prime is 83954657. The reversal of 83954621 is 12645938.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77246521 + 6708100 = 8789^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 83954621 - 2²⁶ = 16845757 is a prime.

It is equal to p_4886633 and since 83954621 and 4886633 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83974621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41977310 + 41977311.

It is an arithmetic number, because the mean of its divisors is an integer number (41977311).

Almost surely, 2^83954621 is an apocalyptic number.

It is an amenable number.

83954621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83954621 is an equidigital number, since it uses as much as digits as its factorization.

83954621 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 83954621 is about 9162.6754280614. The cubic root of 83954621 is about 437.8730354183.

The spelling of 83954621 in words is "eighty-three million, nine hundred fifty-four thousand, six hundred twenty-one".