83890157 has 4 divisors (see below), whose sum is σ = 90343260. Its totient is φ = 77437056.

The previous prime is 83890117. The next prime is 83890171. The reversal of 83890157 is 75109838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29041321 + 54848836 = 5389^2 + 7406^2 .

It is a cyclic number.

It is not a de Polignac number, because 83890157 - 2¹⁴ = 83873773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83890117) 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, 3226532 + ... + 3226557.

It is an arithmetic number, because the mean of its divisors is an integer number (22585815).

Almost surely, 2^83890157 is an apocalyptic number.

It is an amenable number.

83890157 is a deficient number, since it is larger than the sum of its proper divisors (6453103).

83890157 is a wasteful number, since it uses less digits than its factorization.

83890157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453102.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 83890157 is about 9159.1570026941. The cubic root of 83890157 is about 437.7609340841.

The spelling of 83890157 in words is "eighty-three million, eight hundred ninety thousand, one hundred fifty-seven".