61890037 has 4 divisors (see below), whose sum is σ = 67516416. Its totient is φ = 56263660.

The previous prime is 61890007. The next prime is 61890041. The reversal of 61890037 is 73009816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61890037 - 2⁷ = 61889909 is a prime.

It is a super-2 number, since 2×61890037² = 7660753359722738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61889984 and 61890011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61890007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2813173 + ... + 2813194.

It is an arithmetic number, because the mean of its divisors is an integer number (16879104).

Almost surely, 2^61890037 is an apocalyptic number.

It is an amenable number.

61890037 is a deficient number, since it is larger than the sum of its proper divisors (5626379).

61890037 is a wasteful number, since it uses less digits than its factorization.

61890037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626378.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 61890037 is about 7867.0221176758. The cubic root of 61890037 is about 395.5550323705. Note that the first 3 decimals are identical.

It can be divided in two parts, 61 and 890037, that added together give a palindrome (890098).

The spelling of 61890037 in words is "sixty-one million, eight hundred ninety thousand, thirty-seven".