61902801 has 6 divisors (see below), whose sum is σ = 89415170. Its totient is φ = 41268528.

The previous prime is 61902787. The next prime is 61902829. The reversal of 61902801 is 10820916.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 123201 = 7860^2 + 351^2 .

It is not a de Polignac number, because 61902801 - 2⁵ = 61902769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61912801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3439036 + ... + 3439053.

Almost surely, 2^61902801 is an apocalyptic number.

It is an amenable number.

61902801 is a deficient number, since it is larger than the sum of its proper divisors (27512369).

61902801 is a wasteful number, since it uses less digits than its factorization.

61902801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878095 (or 6878092 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 61902801 is about 7867.8333103848. The cubic root of 61902801 is about 395.5822231626.

The spelling of 61902801 in words is "sixty-one million, nine hundred two thousand, eight hundred one".