1374649391 has 2 divisors, whose sum is σ = 1374649392. Its totient is φ = 1374649390.

The previous prime is 1374649361. The next prime is 1374649477. The reversal of 1374649391 is 1939464731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1374649391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1374649301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687324695 + 687324696.

It is an arithmetic number, because the mean of its divisors is an integer number (687324696).

Almost surely, 2^1374649391 is an apocalyptic number.

1374649391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1374649391 is an equidigital number, since it uses as much as digits as its factorization.

1374649391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 1374649391 is about 37076.2645232769. The cubic root of 1374649391 is about 1111.8955224094.

The spelling of 1374649391 in words is "one billion, three hundred seventy-four million, six hundred forty-nine thousand, three hundred ninety-one".