61820901 has 12 divisors (see below), whose sum is σ = 92604512. Its totient is φ = 41213772.

The previous prime is 61820893. The next prime is 61820911. The reversal of 61820901 is 10902816.

It is not a de Polignac number, because 61820901 - 2³ = 61820893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126961 + ... + 127446.

Almost surely, 2^61820901 is an apocalyptic number.

It is an amenable number.

61820901 is a deficient number, since it is larger than the sum of its proper divisors (30783611).

61820901 is an equidigital number, since it uses as much as digits as its factorization.

61820901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254422 (or 254410 counting only the distinct ones).

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

The square root of 61820901 is about 7862.6268511230. The cubic root of 61820901 is about 395.4076888813.

The spelling of 61820901 in words is "sixty-one million, eight hundred twenty thousand, nine hundred one".