83401553 has 4 divisors (see below), whose sum is σ = 85341168. Its totient is φ = 81461940.

The previous prime is 83401537. The next prime is 83401559. The reversal of 83401553 is 35510438.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83401553 - 2⁴ = 83401537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83401559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969743 + ... + 969828.

It is an arithmetic number, because the mean of its divisors is an integer number (21335292).

Almost surely, 2^83401553 is an apocalyptic number.

It is an amenable number.

83401553 is a deficient number, since it is larger than the sum of its proper divisors (1939615).

83401553 is a wasteful number, since it uses less digits than its factorization.

83401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939614.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 83401553 is about 9132.4450723779. The cubic root of 83401553 is about 436.9093905945.

The spelling of 83401553 in words is "eighty-three million, four hundred one thousand, five hundred fifty-three".