61803631 has 2 divisors, whose sum is σ = 61803632. Its totient is φ = 61803630.

The previous prime is 61803607. The next prime is 61803641. The reversal of 61803631 is 13630816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61803631 is a prime.

It is a super-2 number, since 2×61803631² = 7639377609568322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61803631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61803601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30901815 + 30901816.

It is an arithmetic number, because the mean of its divisors is an integer number (30901816).

Almost surely, 2^61803631 is an apocalyptic number.

61803631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61803631 is an equidigital number, since it uses as much as digits as its factorization.

61803631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 61803631 is about 7861.5285409391. The cubic root of 61803631 is about 395.3708656999.

The spelling of 61803631 in words is "sixty-one million, eight hundred three thousand, six hundred thirty-one".