61423437 has 4 divisors (see below), whose sum is σ = 81897920. Its totient is φ = 40948956.

The previous prime is 61423357. The next prime is 61423459. The reversal of 61423437 is 73432416.

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 not a de Polignac number, because 61423437 - 2²³ = 53034829 is a prime.

It is a super-2 number, since 2×61423437² = 7545677225785938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61423487) 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, 10237237 + ... + 10237242.

It is an arithmetic number, because the mean of its divisors is an integer number (20474480).

Almost surely, 2^61423437 is an apocalyptic number.

It is an amenable number.

61423437 is a deficient number, since it is larger than the sum of its proper divisors (20474483).

61423437 is a wasteful number, since it uses less digits than its factorization.

61423437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20474482.

The product of its digits is 12096, while the sum is 30.

The square root of 61423437 is about 7837.3105718735. The cubic root of 61423437 is about 394.5584704851.

The spelling of 61423437 in words is "sixty-one million, four hundred twenty-three thousand, four hundred thirty-seven".