61804387 has 2 divisors, whose sum is σ = 61804388. Its totient is φ = 61804386.

The previous prime is 61804357. The next prime is 61804403. The reversal of 61804387 is 78340816.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61804387 - 2¹⁹ = 61280099 is a prime.

It is not a weakly prime, because it can be changed into another prime (61804357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30902193 + 30902194.

It is an arithmetic number, because the mean of its divisors is an integer number (30902194).

Almost surely, 2^61804387 is an apocalyptic number.

61804387 is a deficient number, since it is larger than the sum of its proper divisors (1).

61804387 is an equidigital number, since it uses as much as digits as its factorization.

61804387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 61804387 is about 7861.5766230445. The cubic root of 61804387 is about 395.3724777905.

The spelling of 61804387 in words is "sixty-one million, eight hundred four thousand, three hundred eighty-seven".