61309495 has 16 divisors (see below), whose sum is σ = 79404192. Its totient is φ = 45175680.

The previous prime is 61309487. The next prime is 61309543. The reversal of 61309495 is 59490316.

It is not a de Polignac number, because 61309495 - 2³ = 61309487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43705 + ... + 45085.

It is an arithmetic number, because the mean of its divisors is an integer number (4962762).

Almost surely, 2^61309495 is an apocalyptic number.

61309495 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61309495 is a deficient number, since it is larger than the sum of its proper divisors (18094697).

61309495 is a wasteful number, since it uses less digits than its factorization.

61309495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 61309495 is about 7830.0379947993. The cubic root of 61309495 is about 394.3143475533.

It can be divided in two parts, 6130 and 9495, that added together give a 6-th power (15625 = 5⁶).

The spelling of 61309495 in words is "sixty-one million, three hundred nine thousand, four hundred ninety-five".