49131397 has 8 divisors (see below), whose sum is σ = 59105600. Its totient is φ = 39896064.

The previous prime is 49131389. The next prime is 49131421. The reversal of 49131397 is 79313194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49131397 - 2³ = 49131389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49131317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184572 + ... + 184837.

It is an arithmetic number, because the mean of its divisors is an integer number (7388200).

Almost surely, 2^49131397 is an apocalyptic number.

It is an amenable number.

49131397 is a deficient number, since it is larger than the sum of its proper divisors (9974203).

49131397 is a wasteful number, since it uses less digits than its factorization.

49131397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369435.

The product of its digits is 20412, while the sum is 37.

The square root of 49131397 is about 7009.3792164499. The cubic root of 49131397 is about 366.2573687203.

It can be divided in two parts, 4 and 9131397, that added together give a triangular number (9131401 = T₄₂₇₃).

The spelling of 49131397 in words is "forty-nine million, one hundred thirty-one thousand, three hundred ninety-seven".