45739621 has 2 divisors, whose sum is σ = 45739622. Its totient is φ = 45739620.

The previous prime is 45739619. The next prime is 45739637. The reversal of 45739621 is 12693754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33802596 + 11937025 = 5814^2 + 3455^2 .

It is a cyclic number.

It is not a de Polignac number, because 45739621 - 2¹ = 45739619 is a prime.

It is a super-2 number, since 2×45739621² = 4184225858447282, which contains 22 as substring.

Together with 45739619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45739121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22869810 + 22869811.

It is an arithmetic number, because the mean of its divisors is an integer number (22869811).

Almost surely, 2^45739621 is an apocalyptic number.

It is an amenable number.

45739621 is a deficient number, since it is larger than the sum of its proper divisors (1).

45739621 is an equidigital number, since it uses as much as digits as its factorization.

45739621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 45739621 is about 6763.1073479577. The cubic root of 45739621 is about 357.6274564690.

It can be divided in two parts, 45739 and 621, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 45739621 in words is "forty-five million, seven hundred thirty-nine thousand, six hundred twenty-one".