61134537 has 4 divisors (see below), whose sum is σ = 81512720. Its totient is φ = 40756356.

The previous prime is 61134497. The next prime is 61134547. The reversal of 61134537 is 73543116.

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 61134537 - 2⁶ = 61134473 is a prime.

It is a super-2 number, since 2×61134537² = 7474863228408738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61134547) 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, 10189087 + ... + 10189092.

It is an arithmetic number, because the mean of its divisors is an integer number (20378180).

Almost surely, 2^61134537 is an apocalyptic number.

It is an amenable number.

61134537 is a deficient number, since it is larger than the sum of its proper divisors (20378183).

61134537 is a wasteful number, since it uses less digits than its factorization.

61134537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20378182.

The product of its digits is 7560, while the sum is 30.

The square root of 61134537 is about 7818.8577810317. The cubic root of 61134537 is about 393.9389071878.

The spelling of 61134537 in words is "sixty-one million, one hundred thirty-four thousand, five hundred thirty-seven".