33990061 has 16 divisors (see below), whose sum is σ = 39682944. Its totient is φ = 28514304.

The previous prime is 33990053. The next prime is 33990083. The reversal of 33990061 is 16009933.

It is not a de Polignac number, because 33990061 - 2³ = 33990053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33990091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76506 + ... + 76948.

It is an arithmetic number, because the mean of its divisors is an integer number (2480184).

Almost surely, 2^33990061 is an apocalyptic number.

It is an amenable number.

33990061 is a deficient number, since it is larger than the sum of its proper divisors (5692883).

33990061 is a wasteful number, since it uses less digits than its factorization.

33990061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 33990061 is about 5830.0995703333. The cubic root of 33990061 is about 323.9296098928.

Adding to 33990061 its reverse (16009933), we get a palindrome (49999994).

The spelling of 33990061 in words is "thirty-three million, nine hundred ninety thousand, sixty-one".